In this Mexican sci-fi fantasy, big beefy Martians invade the earth. Ostensibly, they have come to warn people about the dangers of nuclear testing and exploring space, but their real mission becomes manifest when they begin using their special powers and gadgets to exploit weak earthlings.

Santo fights a group of phony spiritualists who are trying to scam his god-daughter out of her 6 million peso inheritance.

Men are turning up dead after receiving anonymous threats that include the date of their deaths. The latest person to receive one of these threats decides to call Santo the crime fighting wrestler for help. Santo must solve the mystery of the men's murders and confront a gang of Nazis operating in Mexico City.

The Blue Demon faces a murderous satanic hypnotist.