The Empress, a derelict space cruiser, hangs in orbit above the planet's surface. Many have tried to breach its hull, and lay claim to the riches within—but none have returned from its depths. Cliff, however, is determined to bring the treasures the Empress holds back to the surface, and employs the services of Steena—a colour blind spacer—and her feline companion Bat in order to brave whatever dangers lurk within the spaceborne husk's walls.