After the mysterious disappearance of an oil well owner, one of his workers, Gerardo assumes the business management. Soon, the owner's sister arrives from Argentina, and, believing that Gerardo killed her brother to keep the wells for himself, she starts working as a singer under a false name in the same casino her brother disappeared, in order to find out what exactly happened.
Jorge Negrete
as Gerardo Ramírez
Libertad Lamarque
as Mercedes Irigoyen
Meche Barba
as Camelia
Agustín Isunza
as Heriberto
Julio Villarreal
as Demetrio García
José Baviera
as Fabio
Alfonso Bedoya
as El Rayado
Francisco Jambrina
as José Enrique Irigoyen
Fernande Albany
as Nanette
Charles Rooner
as Van Eckerman
Bertha Lehar
as Raquela Ortiz
Julio Ahuet
as Complice de Fabio (uncredited)
