El Santo and his loyal friends will try to disarm a dangerous criminal organization.

A mysterious killer has been strangling women in a variety theater, and the police decide to bring Santo into the investigation. Santo suspects the killer is hiding undercover as one of the theater employees and must discover his true identity before more women are murdered.

When El Santo defeated The Strangler, one of his most formidable foes, he never expected to see him again. However, thanks to Tor, the villain returns from the dead to seeks revenge on Santo.