Three events that seemingly nothing related, namely the murder of a truck driver, the discovery of the corpse of a vitriolic young woman, and the death of another who was crushed, will launch the Inspector Maréchal on the trail of a prostitution network. The girl-mother Olga, a friend of the trucker, confesses her the underwear of the women's exploitation.
| Directing | Ralph Habib | Director |
| Writing | Jacques Companéez | Adaptation |
| Writing | Paul Andréota | Dialogue |
| Art | Alexandre Hinkis | Assistant Decorator |
| Costume & Make-Up | Anatole Paris | Makeup Artist |
| Directing | Claude Pinoteau | Assistant Director |
| Writing | Jacques Constant | Writer |
| Directing | Tony Aboyantz | Assistant Director |
| Editing | Madeleine Bagiau | Editor |
| Sound | Raymond Legrand | Original Music Composer |
| Camera | Roger Hubert | Director of Photography |
| Art | Lucien Aguettand | Production Design |
| Production | Ray Ventura | Producer |
| Production | Robert Woog | Producer |