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
Gaspar Henaine
Liza Castro
Crox Alvarado
Carlos Agostí
Miguel Gómez Checa
Nathanael León
Mario García 'Harapos'
Ángel Di Stefani
Marisela Irigoyen
Juan Garza
Víctor Alcocer
René Cardona III
El Hijo del Santo
Rogelio Gaona
Guillermo Hernández