For years now, Chief inspector Gustave Picard has been trying to bring down Salviati, the dreadful leader of a drug-selling gang. Lucienne Préville, an informer who works for him, has infiltrated the gang but her position is dangerous. On the other hand, Scoppa, Salviati's former right-hand man, has started challenging his former boss. Will Salviati, the brutal public enemy, clear off at last?
| Actor | Role |
|---|---|
 Charles VanelSalviati | Salviati |
 Alice FieldSylvia | Sylvia |
 Pierre LarqueyCommissioner Gustave Picard | Commissioner Gustave Picard |
 Jean-Louis BarraultScoppa | Scoppa |
| AAbel JacquinSiro | Siro |
 Camille BertBaron Darmont | Baron Darmont |
| JJean CyranoNot listed | Not listed |
| MMarcelle YrvenJuliette Picard | Juliette Picard |
 Philippe Richard'Mon Oncle' | 'Mon Oncle' |
 Pierre FinalyNot listed | Not listed |
 Assia GranatouroffDolly Darmont | Dolly Darmont |
 Albert BroquinNot listed | Not listed |
 Maxime FabertNot listed | Not listed |
| MMaurice NiemenNot listed | Not listed |
| CClaudineFirst singer of the duo | First singer of the duo |
| FFabiaSecond singer of the duo | Second singer of the duo |
 Jean ServaisEngineer Philippe Dancourt | Engineer Philippe Dancourt |
| HHélène PépéeNot listed | Not listed |
 André RoanneInspector Paul | Inspector Paul |
 Junie AstorLucienne Réville | Lucienne Réville |