A giant asteroid is heading toward Earth so some astronauts disembark from a nearby space station to blow it up. The mission is successful, and they return to the station unknowingly bringing back a gooey green substance that mutates into one-eyed tentacled monsters that feed off electricity. Soon the station is crawling with them, and people are being zapped left and right!

In his 13th film, Godzilla takes a supporting role to the far more prominently featured Jet Jaguar, an Ultra-Man like robot. Aliens take control of Earth’s monsters and begin using them to destroy the human race. Jet Jaguar decides to stop the attack by recruiting Godzilla and enlarging himself to Monster-size.