After a few days in which the group is largely unsuccessful at finding food, Bell, Howard and Menori are able to catch the tobihane in a pit trap. Despite Sharla's protestations, the tobihane's leg was injured in the process, meaning it would never survive even if they set it free, and Bell butchers it so that they can eat. That night, as the children eat the tobihane in a somber mood, Sharla tells Bell that she hates him, and runs off. Luna follows Sharla and convinces her to see Bell's point of view, and they return to the fire together. In place of Menori's increasingly ineffective leadership, the children elect Luna as the group's new leader.

That night, Luna tries to persuade the others that the creature is just a gentle herbivore, but they can only see the danger it presents. Howard derisively suggests having the creature pull the shuttle's wings, which excites Luna, until she sees the horrified expressions on everyone else's faces. The next day, Luna and Sharla are attacked by the giant lizard, but Sharla's scream brings the creature, which frightens the lizard off. The event was witnessed by all of the other children as well, and they decide to trust the creature. They get the creature to haul the shuttle's wings to the lake, and up into the tree. Sharla names it "Pague", and they see it off into the forest that evening feeling as though they had gained a new friend.

Back at the Magnificent Tree, while Pague lifts the panels up to the house, Menori goes to find food. Following a bird, she finds a cliff which has birds’ nests filled with eggs. However, as she starts to climb, she hurts her cut finger, and instead spends the day standing in the sea, spacing out. That night, as the others sleep, Menori sits with her feet in the lake, playing her violin, remembering what her mother told her about how she could always feel Menori's heart through her violin playing. Luna, also awake, sits down with her feet in the lake as well. Suddenly, with a pink glow, she sees Menori's memories. She tells Menori that she doesn't need to rely on her violin - she can open up to her friends. The next day, with her mother's, father's and Luna's words in her mind, she manages to climb the cliff and gather a large number of eggs for everyone to eat.

The next day, Kaoru and Bell find a stand of bamboo - Kaoru uses some to build a fish trap, while Bell brings some back to the house for plumbing in the shower room. Howard refuses to work, insisting on taking a day off, but the rest of the children build the shower room. Dozing on his chair, Howard loses his balance and falls forwards, dropping into the lake - chair and all. Howard blames Bell for not securing the chair properly, but Bell refuses to get a new chair. Howard retaliates by filling the shower's tank with mud, but when Bell stands up to him and calls him out on it, he winds up falling through the shower room, getting covered with the muddy water. He runs off in anger, while the children repair and restore the shower room. Later, Bell goes to find Howard, and brings him back. Howard has the first shower, and afterwards, the children have a party to celebrate the completion of "Everyone's House" (as newly named by Sharla).

The next day, Bell and Shingo plow a field to plant potatoes, Menori and Howard move the fence line, and Sharla and Chako hang fish out to dry. However, Kaoru's uneaten dinner from the previous night attracts the giant lizard. The children retreat into the house as the lizard starts to eat their fish. Just then, Kaoru returns from hunting, and attacks it. Kaoru's arm gets badly scratched, and Luna runs out to distract the lizard so that Kaoru can get to the house. When Kaoru dismisses Luna's concerns because he was only risking himself, she gets angry with him, and tells him to treasure his life. The children concoct a plan to get rid of the lizard, but in the process of carrying it out, both the lizard and Shingo fall into the lake. Luna dives in to distract the lizard from Shingo, and she suddenly hears a strange voice telling her to grab a spear floating near her. She and Kaoru - jumping from the tree - spear the lizard together and kill it. That night, as Kaoru joins the others for dinner, Luna tells them about the voice she heard.

Luna, Bell and Howard set off down the river. The journey is largely uneventful, until they encounter a waterfall. The raft breaks up, throwing them into the river. As Luna tries to hold onto her father's backpack, both she and Bell get swept over the waterfall. Bell manages to pull Luna and her backpack to shore, while Howard climbs down a rope. The trio are surprised to see that everything in the forest is huge - plants, insects and animals. They are attacked by a giant boar, but the Luna hears the mysterious voice, which saves them. They find a cave in which to spend the night.

Meanwhile, back at the house, Shingo, looking listless, retrieves the communications device from the shuttle. Menori goes with him, concerned about his well-being.

Meanwhile, as Luna, Bell and Howard get deeper into the forest, Luna starts to hear the voice more often. They also find they can jump much higher than usual. Eventually, they encounter some sort of overgrown ruin. Luna's head starts hurting and she suddenly sees an image of an alien family. As the trio approaches the ruin, a giant crustacean suddenly emerges from the water surrounding it. It chases Howard, but gets crushed under a boulder. Howard grabs a piece of one leg as a trophy, but a second crustacean attacks. They flee back to the cliff they climbed down. Pague, who had come to visit the house, suddenly becomes agitated and runs away, followed by Kaoru and Menori. They reach the cliff above the Eastern Forest just in time to pull Luna, Bell and Howard out of reach of the crustacean.

That evening, they discuss their findings. Howard presents his trophy, but throws it away in disgust when slime comes out of it. Chako discovers a strange machine in the slime.

Things come to a head when Howard teases Shingo because he was crying for his parents in his sleep. Shingo runs away in tears, and the rest of the children berate Howard. They search the forest for Shingo, eventually finding him in the shuttle. They send Howard to make amends, and he does so by standing on the shoreline and shouting for his parents. The other children join in, except for Kaoru, who is embarrassed by Chako before he can. That night, Shingo finally fixes the communications system, and a voice comes from the speakers. The children become excited, until Luna reveals that it was the same voice that she'd been hearing in her mind.

The children all return with their foods and plants, and they give them to Luna. That night, while watching over Luna, Sharla tells Chako about how meeting Luna enabled her to open up for the first time, but Luna was awake and heard the whole thing. Chako finds that Luna is much better, and the girls all walk out to watch the sunrise.

The children try to open the door again and search for another door to go back inside, but are unsuccessful. Chako estimates the ruins to be five hundred to a thousand years old. They discuss what to do with the alien boy, and Luna resolves to take him back with them, despite the strain he may put on their resources. They head back, but unnoticed by them, the ruins start to emit a shiny substance from the top.

Meanwhile, back at Everyone's House, Sharla finds an ID card belonging to another boy in Kaoru's clothing while cleaning. When she asks him about it, he tells her it belonged to the person he killed.

The next day, Sharla tells Luna about the exchange she had with Kaoru while the others were at the ruins. Adam helps Menori and Howard hang up fish, and reveals that he has already learned how to do it. Later, Luna teaches him that fire is hot, and he catches on almost immediately, looking to Menori for approval. Howard tries to get him to steal food again, but he's already learnt not to. That night, Adam serves dinner. The following day, the children notice the clouds are getting thicker and the weather colder. Howard, in a fit of jealousy, gives Menori's violin to Adam. She becomes furious with Adam. She realizes her mistake when Howard accidentally lets slip that he'd given Adam the violin and reveals that he was jealous, but Adam has run away. Shingo finds him crying in the cleaning area. Menori apologizes and wipes his tears, and Adam speaks her name, then his own. The two walk back to the house hand-in-hand.

After a week, food supplies at the house are getting low. Bell works on making the cave livable by himself, but Kaoru secretly gives him half the fish he caught. Luna goes to see how Bell is doing, and is surprised by the amount of work he's done. Bell, however, collapses from exhaustion. While resting, he recounts a story from when he was growing up on a developing planet - his father predicted a cold snap coming, but worked on his own to shore up their habitat's safety systems, and because of that, the habitat survived. First Luna, then the others, resolve to help Bell as well, and Bell is soon proven right when Chako determines the substance coming from the ruins is an infrared reflector, which is blocking the heat from the sun, meaning it can only get colder. The cave is soon finished - just in time, as it starts to snow.

That night, they theorize that the ruins may be a terraforming machine, but are unsure of why it's making the weather too cold even for Adam, who came from the ruins. They also mention the herd of pagues, and the children decide to return Pague there. Adam, however, has become attached to Pague, and doesn't want to see him go. They find a cleft that Pague may be able to walk down with the help of a pulley system to control his descent, but it needs work to smooth it down before it can be usable. Howard, chasing a tobihane, accidentally starts an avalanche, which does the job for them. They successfully return Pague to his mother. The children - and Adam especially - are sad to see him go, but know that he will be happy. Howard accidentally discovers a large amount of sweet potatoes that were hidden by the snow.

Inside, they use the cold-sleep capsule's energy system to revive Chako. Chako realizes that the marked locations on the hologram of the planet show the locations of terraforming machines. Adam finds the door to a previously unnoticed room, which has an activated machine inside. Chako and Shingo are shocked by an electric force-field protecting the doorway, but Bell rips the cover off the cold-sleep capsule and presses against the force field until it shorts out. Luna and Adam enter, but are stopped by holograms of Adam's parents, which suddenly turn into amorphous blobs and start to drown them. Luna's mysterious power flares up, enabling her to break free and shut down the machine. Outside, the snow stops and the sun emerges from the clouds.

Chako and Shingo get excited, but Adam becomes downhearted, unable to reconcile the memory of his kind parents with the entities that attacked him and Luna earlier. Shingo interfaces his communications system with the control panel to broadcast a distress signal. Luna and Kaoru arrive with a care package - Kaoru goes back to get everyone else, while Luna comforts Adam. The next day, Chako and Shingo try to make the spaceship fly, but discover it can't lift off because the gravity control unit is broken - Chako realizes that's the reason the gravity was lower in the Eastern Forest. The other children arrive, just as an alert starts flashing on the ship's screen, and the room starts shaking. When the earthquake finishes, a human voice comes from the communications system - someone who picked up their distress call.

As it starts raining, before the other children can start their fires, the Orion arrives from the east, flying over Howard's head and just clearing the trees. It flies over the island, before splashing down in the ocean on the western side. Luna and Sharla see an escape pod fall from the ship before it lands. The children return to Everyone's House to compare notes, then head for the beach. They can see the ship - a transport freighter - wedged on a rock, but nobody seems to be emerging. They start a fire so that they can be seen, and wait for the storm to abate.

The children take Porte to the ruins - leaving Kaoru behind to watch for the prisoners - but Porte, Shingo and Chako find it difficult to interface the Orion's gravity control device with the system in the ruins. Meanwhile, the storm clears and the three prisoners, Brindo, Zilba and Bob, emerge from the ship. They board their ship's life-raft, using Bob's cyborg arm as an outboard motor, and come to shore - on the way, Brindo kills the snake monster with a laser gun. On the beach, they investigate the remains of the children's shuttle, and realize the gyrostabilizer they need must be somewhere else. The trio goes to Everyone's House, while Kaoru returns to the ruins to relay the results of his reconnaissance. They discover, however, that Howard is missing.

Kaoru negotiates an exchange over the radio - the real gyrostabilizer for Howard. Kaoru tries to go alone to make the exchange, risking only himself, but Luna persuades him they need to work together. Knowing that the escapees will try to kill them the moment they get the chance, the children come up with a plan to both rescue Howard and escape with their lives. At dawn, Kaoru, Bell, Luna and Menori move into position to carry it out. Adam, not wanting to be left behind, chases after them.

At the ruins, they lay Howard in the cold-sleep capsule, and Porte gives him an antidote for the poison in the needle. In a feverish dream, Howard relives the last year of his life, from school, where he was always surrounded by followers, to now, where none of the other children ever do what he tells them. He realizes, however, that now is the first time he's ever had true friends. When he awakens, he admits to the others that it was he who'd pressed the release button on the shuttle during the gravity storm. Luna recognizes his courage in telling them, and the children all swear friendship together.

The next day, Adam sneaks out again, and Sharla notices he's missing. She and Luna look for him, finding him with Pague. The three escapees also see Pague, though not the children, and plan to kill him to eat. Kaoru reveals his presence to them as a distraction to allow Luna, Sharla and Adam to escape, but though they all get away, Brindo sees the children leaving the forest, and figures out its secret.

With their traps exhausted, the children barricade themselves inside the ruins, knowing the escapees will be unable to open the door. However, Brindo has figured out the children's attachment to Pague, and captures him to hold him hostage.

The children reach the beach, and find the Orion's life-raft. Luna, Bell, Menori and Howard remain behind to lay traps for the escapees, while the remaining children head for the ship - Kaoru to pilot (as he's the only one of the children with actual pilot training), Porte, Shingo and Chako to crack the door code and repair Porte's sabotage, and Sharla and Adam to keep them away from the escapees. They quickly gain entry and prepare for takeoff, but on the island, Brindo figures out that the children will be lying in wait on the direct path, and so they take a detour, missing the traps completely, and arriving at the beach unhindered.

As Bob batters the door down, they escape, heading back to the cargo hold, but the escapees follow. Sharla climbs into a humanoid-shaped power loader and fights Bob, wailing the whole time, while Kaoru fights Zilba, but in the ensuing struggle, canisters of flammable gas get ignited, causing a large explosion. Realizing the ship is done for, they evacuate, with the children riding on the power loader, and Porte fashioning a parachute from some cloth. The power loader splashes down in the ocean, and the children swim to shore, but Porte lands in the forest, his parachute on fire from burning debris. The escapees gather on the Orion's bridge, and get a front-seat view as the ship collides with the ruins with full force.

Two weeks later, everyone is still despondent and apathetic, with only Luna, Sharla, Bell and Kaoru still taking a proactive role in things. Sharla shows Luna a cargo container from the Orion that she found in the forest, and the two investigate, finding a functioning gravity control unit inside. Luna tries it out, but accidentally gets knocked out when she turns it off, which alerts Adam, who brings the rest of the children. The others criticize Luna for risking herself, but Sharla angrily tells them she did it for their sake. The gravity control unit revitalizes everyone's spirits, and they decide to build a ship to travel to the mainland.

Later, Porte apologizes to Shingo and approves his plans, having realized that Shingo's flexible thinking is better than his own rigid adherence to tradition. While the other children build the ship, Porte, Shingo and Chako work on the ship's wiring and controls. Porte tells Shingo a story from his son - after an argument the two had, the son boarded a newly built colonizing ship, but due to an accident, the ship was lost with all hands. Porte became a mechanic in order to search known space in case his son escaped in an escape pod, but in doing so, saw many amazing sights. Shingo heads for bed, but unnoticed by him, Porte collapses from a pain in his chest.

In the morning, the children find that Porte has died during the night, from space sickness. They tearfully bury him at the foot of the Magnificent Tree, and Sharla announces that the name of their ship will be Orion, the same as Porte's ship. Shingo promises to find Porte's son, and together they leave to launch the Orion. The launching goes off without a hitch, and Pague comes to see them off as they sail away from the island. The long journey to the continent has begun.

As Kaoru and Chako struggle to keep the ship afloat in the storm, Bell and Luna try to furl the sail, but are unable to pull it against the strength of the wind until Howard and Menori emerge from below and help. Just as they finish, Sharla calls up from below - the sleeping room is filling with water. The children scramble to bail the water out, while Bell and Shingo work to seal the leak. As the storm abates outside, the children suddenly realize they're not feeling seasick anymore.

Suddenly, the Orion rides up a huge wave, tipping Luna out of the back of the boat. Despite Bell's efforts to catch her, she is quickly swept away.

The next morning, she awakens on the beach of a small sand cay. She spends the day trying to find food and water, and start a fire, but she's unsuccessful, only getting blistered palms and a cut on her hand for her troubles. After sunset, she finally manages to start a fire using a bow drill which she'd once seen in a movie. As she stares at the fire, she remembers a time when her father took her camping in a colony forest dome once, when they talked about terraforming other planets to make them fit for human habitation.

Awakening early the next morning, she is surprised to notice that her hands have completely healed. That evening, she suddenly hears Adam's voice in her mind, and is overjoyed to see the Orion come sailing out of the sunset.

While Luna spends the day sleeping, Howard tries to catch a fish for a main dish, and the rest of the children prepare the deck for the party. Howard is having no success, but as Chako comes to check on him, an enormous fish suddenly bites his line, dragging Howard into the water. Kaoru stops the ship, and then kills the fish with a spear. After sunset, Luna comes up on deck to start her shift, and the children all spring the surprise party on her. They have a meal prepared for her, then put on a play written by Sharla.

The next morning, Howard, standing watch in the crow's nest, sights land. They've arrived at the continent.

Kaoru fishes, Chako and Shingo check the ship, Luna and Bell find an edible cactus, and Sharla and Howard discover a pair of ostrich-like birds taking care of a nest. The children all go to see, but the male chases them away, and Adam trips over, scraping his hands. Later, Bell goes to help Luna make dinner, and he clumsily offers to be Luna's family since she has no one else. Howard, overhearing, misunderstands it as a marriage proposal, and tells the rest. When they come back to the group, Howard teases Bell, causing him to run away, and Luna follows. The two go back to see the nest again, and Luna tells Bell that she's realized she's not alone like she thought - she has all of the other children as a family.

Luna catches the rest of the children eavesdropping on them, but as they all prepare to head back to the ship, Adam suddenly becomes weak and feverish.

They continue on to the terraforming machine, but are prevented from approaching by a spherical drone that fires a laser at them. Luna wants to approach alone, hoping that the nanomachines in her body - along with Adam's ID card - will cause it to recognize her as one of Adam's people, but the rest of the children insist on acting as decoys. When Luna addresses the drone, it briefly glows blue, and she hears a voice saying "people are unnecessary". The drone vaporizes Adam's ID card, and is about to attack Luna when Bell rescues her. Kaoru leaps on the drone and stabs in with a knife, destroying it, but in the process the drone's laser shatters the entrance door on the terraforming machine. Luna tells the others about the voice she heard.

A thousand years ago it was inhabited a people with a high level of technology, but environmental catastrophes were making it uninhabitable - things such as ozone depletion, pollution, and large-scale tectonic events. The majority of the people built a huge fleet of ships and escaped into space, but some of them remained behind and built terraforming machines to revitalize the planet, creating Survive - who was built into a spaceship - to help manage it. As they began to work, they realized that it would take a thousand years for the planet to return to normal, and sent a message to those who left to let them know. At the same time, Survive came to the conclusion that the people were the cause of the damage to the planet, and in order to protect the planet, it had to kill the people. It released a virus-type nanomachine which caused all of the people to die.

The children question among themselves whether it's possible for people to coexist peacefully with the environment, but are unable to reach a satisfactory conclusion. They find the terraforming machine's medical lab and create a cure for Adam, taking a copy with them in a hand scanner. With Adam cured, they head for the main terraforming machine, and the spaceship that they now know is there.

They become caught in a sandstorm, and the gravity control unit becomes unstable, and then shuts down. Kaoru manages to bring the Orion safely to a halt, but before Shingo and Chako can effect repairs, the Orion starts sinking in quicksand. The children grab what they can and prepare to evacuate. They all jump off the ship together and run for solid ground, but Sharla slips and falls back on the ship. Howard runs back to save her, and Bell follows, with a rope around his waist for safety. Howard gets a grip on Sharla, but because of his safety rope, Bell can't reach them, and they both fall, vanishing into the quicksand and leaving Bell just holding Howard's jacket. The Orion vanishes after them.

The next day, the children continue through the forest, soon reaching a ruined city. When they enter the city, they are immediately chased by three drones. Luna and Kaoru act as decoys to allow the rest to escape, but Shingo, still feeling guilty, tries to sacrifice himself to the drones, but Menori saves him, and the two run into a sewer to escape. Shingo tells Menori he's better off dead, but she slaps him and asks him if Sharla or Howard would be happy if he died. A drone attacks them, and when Shingo tries to protect Menori, Howard's mirror - which was in his jacket around Shingo's shoulders - flies out and distracts the drone, causing it to shoot the ceiling above itself, crushing it.

The other children hear the commotion, and find Menori and Shingo in the sewer. They decide to continue along the sewer, as Chako realizes it's the most direct route to Survive's buried spaceship, and after a long walk, they find themselves up against the spaceship's outer hull.

He leads them to a room near the bottom of the spaceship that's hidden from Survive's control, where Chako, realizing the being is a robot, reprograms him to speak a language the children can understand. He introduces himself as Tswarkom, but Chako decides that's too difficult to pronounce and dubs him Tako. Tako shows Adam a message from his parents, in which they explain they placed him in the ruins to keep him safe from Survive, to be awoken from cold sleep after the planet's restoration was complete. The ruins would also provide someone to take care of him - Luna - but in doing so would leave them open to infiltration by Survive, which is why it became so cold.

Adam asks Tako where his parents are now, and Tako takes the children to a huge room filled with hovering coffins. Tako lowers one of the coffins to the floor, and Adam's parents are inside. Later, the children realize that regardless of whether they plan to stay on the planet or take the spaceship and leave, they'll need to do something about Survive. They decide to use the hidden room as a base, and ask Tako about food supplies. Tako takes them along a secret tunnel to a forested area by a lake outside the spaceship, where they see the spaceship - and the main terraforming machine - from the outside for the first time.

Later, when the children return to finding food, they discover that all the drones have disappeared, which concerns them. They tell Sharla about the hidden room. The pague and his mother return, and Sharla and Howard take him to play with it, but out of everyone's sight, they share sinister glances. They suggest to Adam that he pick flowers for Luna at the end of a tree branch overhanging the lake, but when he climbs the tree, Howard shakes the branch, causing Adam to fall into the water, and then jumps in after him. Adam calls out for Luna, and she, Bell and Howard dive in to save Adam and Howard. When Kaoru reaches Adam, Adam is already sinking, but Luna's power activates, and he starts floating up again.

On the shore, the children are concerned about Howard's listless state, but when Chako tries to scan him again, he knocks her away. In private, Sharla tells Luna he's suffering from post-traumatic stress from being buried in the quicksand, but when they hug, Luna again feels a strange sensation. As the sun sets, the children return to the hidden room, and Sharla and Howard again share sinister glances.

The plan is succeeding, and they have progressed much of the way up the ship, but back in the hidden room, Sharla claims to see something in the first section they cleared, and Howard goes to investigate. Pretending to look around, he places his hand - which glows blue - over Shingo's chip, which alerts Survive. Suddenly, all of the modified chips start overloading, bringing the drones, and the children flee back to the hidden room. When Tako determines the signal that alerted Survive came from the first cleared section, Tako, Chako and Shingo immediately suspect Howard and Sharla. Chako and Luna set a trap to trip up Howard and Sharla, and Sharla falls for it. Howard and Sharla overpower Luna and flee the hidden room.

The children escape the hidden room, and split into two groups for a two-pronged assault and ride separate lifts to the top of the spaceship. The nebulizers work on the drones, but Sharla confronts one of the groups with a laser pistol. Bell distracts her with his jacket, and then knocks her out. In the other group, the drones destroy Kaoru's nebulizer, but Luna's power flares up and disables the drones. They enter Survive's room, where they find Howard lying on the floor, but when they approach, he stands up and holds a laser pistol to Adam's head.

Survive starts to scan Luna to determine the source of her power, and the other group arrives with Sharla. Survive tells Luna he caused the quicksand in order to take Howard and Sharla, and has been using them for various experiments since. Luna becomes angry at the callous use of her friends, and her aura changes from pink to dark red, but Adam brings her back to her senses. As Survive continues to taunt her, she remembers her father's words on terraforming, and her aura turns pink again. The children all appear in a strange landscape, where they call out to Howard and Sharla, and they remember all the things that happened to them since they arrived. In Survive's room, the children are all surrounded by a whirling pink field. Luna gathers her energies and those of her friends in her hand, and blasts the nanomachines out of Howard and Sharla's bodies, returning them to normal.

Survive admires Luna's power, but as the children have another tearful reunion, an alert sounds, and the room starts shaking.

Survive agrees, and the children split up to investigate - Shingo and Chako go over the data, and Tako takes the others in an anti-gravity sled to do field investigation in the volcano under the main terraforming machine. They ride an elevator down an investigation shaft, taking samples of rocks over the last thousand years, and a magma sample, but another earthquake strikes and the elevator's mechanics fail, including the refrigeration system. Held in place only by the emergency brakes, the children are at risk of burning to death from the heat of the magma, but Shingo comes up with the idea of exploding the refrigeration system's compressed air tanks to push the elevator up the shaft.

The plan is successful, and the drones are able to hold the lift in place at the top of the shaft just long enough for all the children to climb out. Analyzing the samples back on the spaceship, Shingo, Chako and Tako discover that the planet suffered a large change in gravity a thousand years ago, and they realize the cause of the problems is outside the planet - the gravity storm which brought the children's shuttle and the Orion. Suddenly, an alarm sounds.

Sharla follows Howard into the forest outside, while Kaoru, Shingo, Chako and Tako go to check the condition of the ship, and Bell talks with Menori. Survive wants to carry out the plan immediately, but Luna convinces him to wait - she knows there's no way the other children, even Howard or Menori, would want to see the planet destroyed.

However, another earthquake strikes, and a crack opens up in the forest, swallowing Howard and Sharla. They catch themselves on a ledge, and walk along it, hoping to find a way out. They find the mother pague, who had also fallen into the crack, and Sharla bandages its injured leg. The rest of the children notice that Howard and Sharla haven't returned, and go looking for them. In the crack, the ledge crumbles, dropping the mother pague into the crack, but the children turn up in the anti-gravity sled just in time, and catch her. They return the pague to her child, and they all agree there's no way they can just let the planet be destroyed.

Suddenly, the gravity storm's power level increases. The children make plans to compensate, but Survive, not willing to risk himself on a plan that now has only a small probability of success, shuts down their control panels and starts taking the ship back to the planet. Luna runs to Survive's room to talk with him directly, telling him that even if their plan may not work if they try, the planet is guaranteed to be destroyed if they don't try. To give him courage, she agrees to let Survive absorb her. He does so, and her aura changes from pink to blue, and Survive's circuits power up to full. Luna explains to Survive the meaning of his name, and he gives control back to the children.

They get back on course, but the gravity storm's energy increases again, causing something on the outside of the ship to explode.

In the storm, Survive matches the storm's gravity field, and struggles to produce an inverse field as a blue aura spreads from the ship. The storm starts to overwhelm the ship, but as Luna pours more of her will and determination into it, the aura turns gold, then rainbow. However, it's too much for the ship, and it explodes, unable to destroy the gravity storm. However, on the planet, Tako realizes they were able to change the storm’s course by enough to avoid the planet. As the other children grieve for Luna, she finds herself floating in a strange space. Her father appears and congratulates her for a job well done. Promising her they'll meet again, he sends her back to the real world.

She awakens with a start inside a nanomachine shield projected by Survive, floating in space. With his mission complete and his support equipment gone, Survive charges Luna to continue his work and dissipates. Suddenly, the ships of the evacuation fleet that left the planet a thousand years ago appear, having received the message sent by Adam's parents and their colleagues. They give the children a spaceship which they can use to fly through the gravity storm before it disappears in order to return home, while Adam and Tako remain with his people to look after the planet. Menori gives Adam her violin, promising to return someday. As they fly away, they realize they never gave a name to the planet, and without hesitation Sharla names it Planet Survive. The ship enters the gravity storm.

A number of years later, Kaoru has become a shuttle pilot, Bell has become a planetary settlement worker, Sharla has become a writer and has written the story of their adventures, Shingo has become a ship's mechanic, Menori has become her father's secretary and is working to open trade with Planet Survive, and Howard has become a famous actor. Luna and Chako, however, are in the ruins of Paris on Earth, using what they learnt on Planet Survive to revitalize and terraform the planet. Today, for the first time, Luna can take her helmet off and breathe the outside air, but they still have a lot of work to do.