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.
| Writing | Mauricio Magdaleno | Adaptation |
| Directing | Luis Buñuel | Director |
| Sound | José de Pérez | Sound Re-Recording Mixer |
| Sound | Manuel Esperón | Original Music Composer |
| Production | Federico Amérigo | Production Manager |
| Directing | Pedro López | Script Supervisor |
| Costume & Make-Up | Armando Meyer | Makeup Artist |
| Sound | Javier Mateos | Sound Recordist |
| Camera | Carlos Martel | Camera Operator |
| Art | Raúl Serrano | Set Decoration |
| Directing | Moises M. Delgado | Assistant Director |
| Art | Javier Torres Torija | Production Design |
| Editing | Gloria Schoemann | Editor |
| Production | Óscar Dancigers | Producer |
| Camera | Jack Draper | Director of Photography |
| Costume & Make-Up | María de Jesús Lepe | Hairstylist |
| Writing | Michael Weber | Original Story |
