A crime has been committed. Two police officers with very different personalities are in charge of the investigation. This one turns out to be complicated, the culprit being almost unsuspected.
| Actor | Role |
|---|---|
 Maurice LagrenéeInspector Grey | Inspector Grey |
| RRaymond MaurelDupré | Dupré |
| CColette BroïdoHélène | Hélène |
| PPaule DagrèveMonique Jeffries | Monique Jeffries |
 Jean BrochardInspector Poussin | Inspector Poussin |
| GGine EllyRachaud's daughter | Rachaud's daughter |
| VVictor GrailVictor | Victor |
 Fernand MaillyCommissioner | Commissioner |
 Alexandre MihalescoBrown | Brown |
| NNicole RayArmandine | Armandine |
| SSylvaineVictoire | Victoire |
 Gabrielle RosnyNot listed | Not listed |