The story takes place in 2048, an era of rapidly advancing technology in which Earth has fallen into dire straits. The effects of nuclear explosions have caused Earth's ecological environment to deteriorate sharply, resources are desperately scarce, and humanity faces a grave crisis of survival. In search of a new home, humanity has no choice but to turn its gaze to the distant reaches of space and launch an interstellar exploration program. Technology has made major breakthroughs in this era, but many unknowns and challenges remain. Though space exploration technology can support interstellar travel, all kinds of accidents and difficulties may arise at any moment during the long journey.
