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