A pair of smugglers manage to pick up a castaway while running from the authorities, who turns out to be the only survivor from a secret mission to destroy a mysterious superweapon designed by the evil Count Zartharn. The smugglers are soon recruited by the Emperor to complete the mission, as well as to rescue the Emperor's son, who has gone missing.

The crew of a space ship confronts an evil galactic ruler out to rule the universe. Also known as "Escape from Galaxy 3", "Starcrash II" or "Star Crash II" dubbed in English