A group of martial arts students are en route to an island that supposedly is home to the ghosts of martial artists who have lost their honor. A Hitler lookalike and his gang are running a female slavery operation on the island as well. Soon, the two groups meet and all sorts of crazy things happen which include cannibal monks, piranhas, zombies, and more!

In California, an old man (Bela Lugosi) grieves the loss of his wife (Vampira) and on the next day he also dies. However, the space soldier Eros and her mate Tanna use an electric device to resurrect them both and the strong Inspector Clay (Tor Johnson) that was murdered by the couple. Their intention is not to conquest Earth but to top mankind from developing the powerful bomb "Solobonite" that would threaten the universe. When the population of Hollywood and Washington DC sees flying saucers on the sky, a colonel, a police lieutenant, a commercial pilot, his wife and a policeman try to stop the aliens.