On the dusty planet Devil, where refugees are settled, a young man Dio lives in a family of miners. Life, apparently, does not bode well for him. But suddenly a call comes to the capital, to the Navigator School. It turns out that he is the son and heir of the Emperor, whose empire is captured by enemies. Dio graduates from school and becomes a spaceship pilot. Once, when he was carrying a secret package for the Supreme Council of the Galactic Union, his ship crashed. Feeling that the ship is falling, Dio unconsciously calls the coordinates as if unknown to him... The ship is saved and smoothly descends to the cosmodrome. But what kind of cosmodrome is this base?