The final summer of the 20th century… when mankind learns it is no longer the sole ruler of planet Earth.
The planet is beset by the emergence of colossal creatures that roam the Earth, and king among them is “Godzilla”. For a half a century, these beasts engage in ferocious battle with each other and mankind. Ultimately humanity, unable to compete, prepares for exile from its home planet. In the year 2048, a select few humans are chosen by the central government’s artificial intelligence to set out on an interstellar emigration vessel, the Aratrum, on an 11.9-light-year journey for the planet Tau Ceti e. But when they arrive after 20 years of space travel, the remnants of mankind find the environmental conditions on Tau-e to be much worse than expected, and uninhabitable by humans.
On board the vessel is a young man, Haruo. When he was four years old, he saw his parents killed by Godzilla before his eyes, and in the 20 years since he has thought about nothing but returning to Earth and defeating Godzilla. With their chance for escape to another world closed, and living conditions on the ship deteriorating, Haruo spearheads a movement to return to Earth despite the dangers of such a long return trip.
Somehow, the Aratrum makes the return journey in one piece, but the home they return to has become an alien planet. 20,000 years have elapsed, and a new ecosystem has emerged with Godzilla at its apex. Can mankind take back its native planet? Will Haruo get his revenge?