A friendly average Frenchman pretends to be a famous commissioner on vacation. He arrives in a castle converted into a boarding house where, after dinner, guests are invited to participate in a "murder-party". The so-called victim of this little game is really murdered and the fake commissioner must lead the investigation.
| Actor | Role |
|---|---|
| MMax RégnierNot listed | Not listed |
| NNicole RicheNot listed | Not listed |
 SinoëlNot listed | Not listed |
 Léonce CorneNot listed | Not listed |
 Charles DechampsNot listed | Not listed |
 Georges GossetNot listed | Not listed |
 Marcelle MonthilNot listed | Not listed |
| EEugène FrouhinsNot listed | Not listed |
 René LacourtNot listed | Not listed |
 Elisa RuisNot listed | Not listed |
 Christian GérardNot listed | Not listed |