A few years ago, Isabelle Leritz, a famous pianist, suffered a fit of madness, in the middle of a concert. Now recovered, she fell in love with Jacques whom she plans to marry. She does not know that he is having an affair with Caroline, his sister, director of a fashion house.
| Actor | Role |
|---|---|
 Simone SignoretIsabelle Leritz | Isabelle Leritz |
 María CasaresCaroline Bessier | Caroline Bessier |
 Jean MarchatShurman | Shurman |
 Pierre Duxle médecin | le médecin |
 Germaine Reuverla patronne | la patronne |
 Jacques BerthierJacques Barrois | Jacques Barrois |
| AAlbert PlantierEugène | Eugène |
 Albert Michelle patron | le patron |
 Paul Villéle patron du restaurant | le patron du restaurant |
| YYannick MullerNot listed | Not listed |
 René BerthierPetit rôle (uncredited) | Petit rôle (uncredited) |
| GGérard BuhrLe garçon de café (uncredited) | Le garçon de café (uncredited) |
| GGérard GervaisPetit rôle (uncredited) | Petit rôle (uncredited) |