The military is tracking a satellite that is returning to Earth from it's mission to take pictures of Mars. As their helicopter approaches the splashdown site, a giant mechanical dragon submarine of the Manchurian Menace appears and snatches the satellite. They down the helicopter and a distress call goes out to Buzz and Frankenstein Jr.
Buzz and Frankie find the Manchurian Menace's hideout and when they enter he traps them. After a short battle, the Manchurian Menace flees in his submarine. He fires a torpedo at Frankie and Buzz as they follow him and they barely are able to dodge it. Frankie grabs the tail of the submarine and a smaller one pops out of the head and tries to escape to a cave. Frankie seals the cave entrance and the Manchurian Menace crashes into it. They return the satellite and turn over the Manchurian Menace to the authorities.