Born on the moon, Toya half-heartedly welcomes three kids from Earth to his home in space. But during the welcome party a terrifying accident occurs.

Toya and Taiyo make their way through the station to find their friends after the shockwave from the passing comet knocks out oxygen and the internet.

The rabbit mascot comes to aid the children, who are trapped in a room leaking air. But to escape, the kids must walk outside in space to reach a ship.

Toya makes contact with his uncle, the Captain, but further disaster threatens the kids and humanity as a whole when someone takes over the station.

The kids learn the truth about the harrowing prophecy of Seven and the extremists who support him as comets continue to hurdle toward Earth.