In 1961 Shichiro was put into hibernation by his father to survive the nuclear war he suspected would come. It is now 2061 and humanity lives in space and is trying to return to Earth. Shichiro wakes at the foot of a mountain and after being rescued discovers that he is the 7th person ever who is immune to the aftereffects of Hydrogen bombs, which puts him in a unique position to help humanity return home, armed with some of his father