On a mission to Zartaitt, a planet famed for its thirteen moons, heroines Galaxima, Sahara, and Thunder Gal investigate unusual radioactivity on the thirteenth moon, Thunder Gal. Landing on the seemingly deserted moon, they are exposed to strange fumes that amplify their sexual desires, leading to an uncontrollable orgy among them. The fumes reveal a hidden palace, and the trio is ambushed by numerous clones led by Wazazi, a villain planning a galactic invasion with his aphrodisiac clones. Captured and bound, the heroines face interrogation, with Wazazi targeting the inexperienced Galaxima, exploiting her vulnerability to seduce and manipulate her. 

While Sahara and Thunder Gal endure torment from the clones, Sahara uses her ability to transform into sand to escape and free Thunder Gal, defeating their captors. Meanwhile, Wazazi nearly deflowers Galaxima, which would strip her of her powers, but Sahara and Thunder Gal intervene just in time. Wazazi escapes, vowing revenge, leaving Galaxima shaken but intact, her powers preserved. The heroines reflect on the close call, aware that Wazazi remains a formidable threat, setting the stage for future confrontations in their fight against his perverse galactic ambitions.