Michel Piccoli plays a police inspector whose best friend is murdered on the orders of gang boss Charles Vanel. The inspector knows full well that Vanel is too crafty and well-connected to ever stand trial for his crime, so he carefully lays a subtle trap for his adversary. Unfortunately, both Piccoli and Vanel are thwarted by a pair of scheming females.
| Directing | Pierre Chenal | Director |
| Writing | Auguste Le Breton | Novel |
| Writing | Jean Ferry | Screenplay |
| Writing | Pierre Chenal | Screenplay |
| Writing | Paul Andréota | Screenplay |
| Sound | Michel Legrand | Music |
| Editing | Suzanne Rondeau | Editor |
| Camera | Marcel Grignon | Director of Photography |
| Production | Robert Woog | Line Producer |
| Art | Lucien Aguettand | Art Direction |
| Production | André Chabrol | Unit Manager |
| Sound | Pierre-André Bertrand | Sound |
