"Innocent women are being kidnapped and used as guinea pigs for a brain transplant experiment. The diabolical Dr. Frankenstein continues his quest to perfect his brain transplant operation to bring back his deceased wife who had died of brain cancer at any cost - even if it means paying with the lives of others. El Santo and Blue Demon are called in to help when their friend Alicia becomes Dr. Frankenstein's next target. It'll take both heroes to...