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.
| Actor | Role |
|---|---|
 Jorge NegreteGerardo Ramírez | Gerardo Ramírez |
 Libertad LamarqueMercedes Irigoyen | Mercedes Irigoyen |
 Meche BarbaCamelia | Camelia |
 Agustín IsunzaHeriberto | Heriberto |
 Julio VillarrealDemetrio García | Demetrio García |
| JJosé BavieraFabio | Fabio |
 Alfonso BedoyaEl Rayado | El Rayado |
 Francisco JambrinaJosé Enrique Irigoyen | José Enrique Irigoyen |
 Fernande AlbanyNanette | Nanette |
 Charles RoonerVan Eckerman | Van Eckerman |
| BBertha LeharRaquela Ortiz | Raquela Ortiz |
 Julio AhuetComplice de Fabio (uncredited) | Complice de Fabio (uncredited) |
| EEmilio GaribayComplice de Fabio (uncredited) | Complice de Fabio (uncredited) |
| SStephen BerneEspectador casino (uncredited) | Espectador casino (uncredited) |
 José MuñozEmpleado de Irigoyen (uncredited) | Empleado de Irigoyen (uncredited) |
| IIgnacio PeónCochero (uncredited) | Cochero (uncredited) |
| MMaría ValdealdeCantante abucheada (uncredited) | Cantante abucheada (uncredited) |