Caroline feels neglected by her husband, the businessman Lorin. She plans to have fun with an inventor but finds herself, following a combination of circumstances, locked up in a psychiatric clinic. To get out of it, she is forced to take on the identity of the wife of a third man, whom she resembles.
| Actor | Role |
|---|---|
 François PérierMichel | Michel |
 Sophie DesmaretsCaroline | Caroline |
 Alfred AdamPierre Lorin | Pierre Lorin |
| AAbel JacquinDemaison | Demaison |
 Margo LionMiss Marcelle, head nurse of the psychiatric clinic | Miss Marcelle, head nurse of the psychiatric clinic |
| HHélène PépéeMadwoman | Madwoman |
 Maurice TeynacChimerowitz | Chimerowitz |
| RRené SternButler | Butler |
| JJean SylvainDomestic | Domestic |