In 1961, Shichiro was placed in hibernation by his father as he foresaw a nuclear war. After humanity's attempt to return to Earth in 2061, Shichiro wakes up at the foot of a mountain. He soon discovers that he is among an extremely rare group of only seven people who are not affected by the harmful effects of hydrogen bombs. Alongside his father's creations and the previous six individuals, Shichiro has a distinctive opportunity to aid humanity in their pursuit of returning home.