Inspector Doirel investigates the murder of a man whose servant was found tied up. He discovers very quickly that the servant has lied. The latter ends up denouncing his accomplice who is arrested when he was going to kill the informer.
| Actor | Role |
|---|---|
 FlorelleClara | Clara |
 Maurice LagrenéeInspector Doirel | Inspector Doirel |
 Pierre Stéphen'Le Furet' | 'Le Furet' |
 Jacques Varennes'Le Jouyeux' | 'Le Jouyeux' |
 Georges PaulaisRoger Duboc | Roger Duboc |
 André NoxHotel manager | Hotel manager |
| RRené SternLouis | Louis |
 Philippe HersentClaude Lorrain | Claude Lorrain |
| RRobert DesclosBastien | Bastien |
| CCharles LericheNot listed | Not listed |
 Milly MathisConcierge | Concierge |
| MMaximilienneMadame Phalempin | Madame Phalempin |
 Max Doria(uncredited) | (uncredited) |
| LLucien Ferney(uncredited) | (uncredited) |