Ep. 25: Adam recalls his parents' final words, activating a hidden door in the Star Hole ruins.
Adam dreams of his parents in a control room before waking up at Star Hole. Chako and Shingo suspect the ruins are a spaceship and investigate with Kaoru for five days while others return to Everyone's House. Adam remembers his mother saying "for the sake of the future," which triggers the walls to light up and reveals a hidden door. Shingo broadcasts a distress signal using his communications system. Luna and Kaoru arrive with supplies, and Luna comforts Adam, who struggles with conflicting memories. The next day, the group finds the gravity control unit broken, explaining the lower gravity in the Eastern Forest. As the other children arrive, an alert flashes and the room shakes. After the earthquake, a human voice responds to their distress call over the communications system.
Episodes
- Ep. 21 · Luna and others investigate ruins while Bell prepares a cave as winter approaches
- Ep. 22 · Children return Pague to his herd after an accidental avalanche clears a path in the snow
- Ep. 23 · Kaoru falls into a crevasse while hunting, and Luna rescues him during a heavy snowstorm.
- Ep. 24 · The Blizzard Traps the Children as They Investigate a Biometric Card
- Ep. 25 · Adam recalls his parents' final words, activating a hidden door in the Star Hole ruins.
- Ep. 26 · Shingo contacts the Orion spaceship which needs a gyrostabilizer before radio silence.
- Ep. 27 · Porte reveals the Orion's dark secret while the escaped prisoners approach the shore.
- Ep. 28 · Howard trades a stolen component to escapees who betray him, prompting a rescue plan by the children.
- Ep. 29 · Menori negotiates hostage exchange while Howard is poisoned and Adam arrives with a giant crustacean.