Tony Pintana, an art collector, and his wife are contacted by Martin, who is short on cash and proposes to rob a museum of a Indian golden mask that's worth 10 million dollar. When their attempt miserably fails, the museum decides to have the mask transported to a safer location. The three try their luck again and are successful this time. Chased by a policeman who isn't convinced they're innocent, the three will have a difficult time selling the mask on the black market.
| Writing | José Gutiérrez Maesso | Writer |
| Directing | Gordon Hessler | Director |
| Writing | Ricardo Ferrer | Writer |
| Art | Rafael Ferri | Set Decoration |
| Camera | Julio Bragado Darman | Director of Photography |
| Production | Francisco Ariza | Production Manager |
| Directing | Isabel Mulá | Script Supervisor |
| Production | José Gutiérrez Maesso | Producer |
| Editing | Alessandro Lucidi | Editor |
| Sound | Adolfo Waitzman | Music |