Mr. Flea is on his annual fishing trip and The Mascaritas join, and it turns out 'one' got away, although it's not a fish. It's a giant worm named Gordo Gus. Mr. Flea's trying to get his belt back from within him. / After The Flea fakes injury in his spleen, he must go to the hospital where an evil doctor plans to pull out his aching spleen with his 'Luchamonster.' The Flea must stop him with the help of his organs.