The maid of a clandestine brothel in Marseille is found murdered. The inspector Sergil, in charge of the investigation will employ somewhat particular methods in order to unmask the assassin.
| Actor | Role |
|---|---|
 Paul Meurissel'inspecteur Sergil | l'inspecteur Sergil |
 Claudine DupuisElisabeth Poirier, dite Lily | Elisabeth Poirier, dite Lily |
 Albert Dinanl'inspecteur Léon, l'adjoint de Sergil | l'inspecteur Léon, l'adjoint de Sergil |
 René SarvilGaston Brivaut, commerçant et trafiquant | Gaston Brivaut, commerçant et trafiquant |
 Colette Deréal'Bouche-en-Coeur' | 'Bouche-en-Coeur' |
 Michel ArdanNot listed | Not listed |
| PPierre ClarelNot listed | Not listed |
 Ginette BaudinNot listed | Not listed |
 Alexandre ArnaudyNot listed | Not listed |
| CCécilia BertNot listed | Not listed |
| CColette MayerNot listed | Not listed |
| PPerrachiaNot listed | Not listed |
| YYvonne ClairyNot listed | Not listed |
| JJean DanielNot listed | Not listed |
| RRaoul KellerNot listed | Not listed |
| KKoulourisNot listed | Not listed |
| MMarie RémiNot listed | Not listed |
| MMax MouronNot listed | Not listed |
| YYves StraussNot listed | Not listed |
 Henri AriusFernand | Fernand |
| AAnnie HémeryIrène | Irène |