In the last moments of World War II, a secret Nazi space program evaded destruction by fleeing to the Dark Side of the Moon. During 70 years of utter secrecy, the Nazis construct a gigantic space fortress with a massive armada of flying saucers.

When American astronaut James Washington ( Christopher Kirby ) puts down his Lunar Lander a bit too close to the secret Nazi base, the Moon Führer ( Udo Kier ) decides the glorious moment of retaking the Earth has arrived sooner than expected. Washington claims the mission is just a publicity stunt for the President of the United States ( Stephanie Paul ), but what else could the man be but a scout for the imminent attack by Earth forces? The Fourth Reich must act!