The Champions against an army of rats turned into people.

Mano Negra sends a group of alien dwarves led by Aker to the state laboratory to kidnap the professor Arego and obtain the formula for the cultivation of microorganisms. The formula is divided among his four daughters and most work at a circus. The aliens take capsules that make themselves invisible, kidnap the girls and are eventually revealed to be blue-skinned, red-eyed monsters who are reduced to a puddle of green goo when killed.

Blue Demon and pals square off against the Black Hand's army of super powered midgets. Five luchadores (Blue Demon, Mil Mascaras, El Medico Asesino, La Sombra Vengadora, Tinieblas plus Black Shadow) face off against a mad scientist and his army of powerful wrestling midgets.