El Santo, the masked Mexican wrestler, investigates a series of kidnappings. He discovers that the mysterious Doctor Caroll is using the victims as part of his experiments to develop an army of monsters. Naturally, El Santo is able to overcome them all - with wrestling!

Science Fiction, Action, Horror

El Santo, Norma Mora, Rubén Rojo, Roxana Bellini, Claudio Brook, José Luis Jiménez