After a group of violent lepers escapes from a sanitarium, - robbing several farms, residents of the town demand the the sheriff - take action. Meanwhile, a local criminal joins forces with the lepers - to commit even more robberies. As the disfigured madmen keep the - entire town indoors with its reign of terror, the sheriff has no - choice but to call on the only man who can help--legendary wrestling - superhero, Santo!

El Santo
as Santo

Armando Silvestre
as Dario

Julio Aldama
as Camerino

Mary Montiel
as Carmen

Gregorio Casal
as Jose

Ivonne Govea
as Lupe

Carlos Agostí
as Dr. Ramos

Carlos Suárez
as

Nathanael León
as

Gloria Chávez
as