In the year 2058, chaos erupts on Clayad, the third planet of the distant Ypserlon system, as alien invaders descend upon its inhabitants. Amidst the turmoil, the displaced emigrants, including children separated from their families, find refuge aboard the training spacecraft, Janous. Through great trials and losses, they eventually reach the war-torn fourth planet, Belwick, only to face the harsh reality that Earth is their next destination, with no choice but to navigate this journey alone.