The year is 2080, and earth as we know it is no longer the same. Wrecked by years of global warming and pollution, most of the population centers have long gone. People had no choice, but to look for another planet. Ten spaceships had survivors on board and they traveled through space for a long time, but were unable to find an inhabitable planet. During the course of their journey, they encountered extraterrestrial threats and lost nine of their spaceships. When people on the surviving ship were in a moment of despair, they had a strong feeling of nostalgia for home, the Earth...