In the wake of humanity's extinction, a teenage girl is raised by a robot designed to repopulate the earth. But their unique bond is threatened when an inexplicable stranger arrives with alarming news.
As the sun is dying out, people all around the world build giant planet thrusters to move Earth out of its orbit and sail Earth to a new star system. Yet the 2500-year journey comes with unexpected dangers, and in order to save humanity, a group of young people in this age of a wandering Earth fight hard for the survival of humankind.