The detectives of the Paris Judicial Police, based at the Quai des Orfèvres, are mobilized by four criminal cases. A double murder, perpetrated in a hotel on the Place de Clichy, intrigues the investigators. The owner and a little maid were murdered in cold blood.
| Sound | Jacques Météhen | Music |
| Directing | Maurice de Canonge | Director |
| Camera | Georges Million | Director of Photography |
| Writing | Marcel Rivet | Screenplay |