Mortal is ready to do anything to obtain a divorce from his wife Nadia. To compromise her, he needs to find her a lover. He thinks he has found the ideal candidate in the person of a manly private detective by the name of Robert Arnaud. But the experience gets out of Mortal's control as, on the one hand, Robert and Nadia fall in love for good, and, on the other hand, Robert, assisted by resourceful young Toto, manages to expose Mortal as the jewel thief he is.
| Actor | Role |
|---|---|
 Albert PréjeanRobert, detective | Robert, detective |
 Elvira PopescuNadia Mortal | Nadia Mortal |
 Marcel MouloudjiYoung Toto | Young Toto |
 Roger KarlMortal, Nadia's husband | Mortal, Nadia's husband |
 Régine DancourtThe maharanée | The maharanée |
| PPauline CartonConcierge | Concierge |
 Héléna MansonJulie | Julie |
| BBillie SparowNot listed | Not listed |
 Marcelle RexianeNot listed | Not listed |
| AAmy CollinNot listed | Not listed |
 Anthony GildèsOms | Oms |
 Henri CrémieuxThe witness | The witness |
 Georges BeverUsher | Usher |
 Marcel MaupiBartender | Bartender |
 Gaston DuprayMaître d'hôtel | Maître d'hôtel |
 Lucien CallamandDoorman | Doorman |
 Robert OzanneTaxi driver | Taxi driver |
| PPaul GrailNot listed | Not listed |
| GGerlyNot listed | Not listed |
| MMarcello SpadaNeapolitan driver | Neapolitan driver |
| MMiroThe dog | The dog |