Calpuina is a night-watchman in a wharehouse, a perfect job for him. When some thieves break in and steal some crates, El Santo is after them because they are using the wharehouse for diamond smuggling. Capulina hinders their capture. Then he decides that he will put on a wrestler's mask and help El Santo to caputre the crooks.
El Santo
as Santo
Gaspar Henaine
as Capulina
Liza Castro
as
Crox Alvarado
as Chief of Police
Carlos Agostí
as Cedric
Miguel Gómez Checa
as Scientist
Nathanael León
as Henchman (as Frankenstein)
Mario García 'Harapos'
as
Ángel Di Stefani
as Capulina's boss
Marisela Irigoyen
as Female robot (as Marisela Irigollen)
Juan Garza
as Henchman
Víctor Alcocer
as
