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