Nicole (Agnes Soral) is sent up the river for infanticide in this routine woman-in-prison feature. There she meets Marthe (Annie Girardot), a fellow murderess who receives special treatment from the warden Dessombes (Marie-Christine Barrault). The warden frames Nelly (Bernadette Lafont) for drug possession and has her thrown into solitary confinement. Sabien (Corinne Touzet) is a newcomer convicted of armed robbery who latches on to the lesbian Lucie (Milva), a longtime prisoner slated for release.
| Actor | Role |
|---|---|
 Bernadette LafontNelly Roux | Nelly Roux |
 Marie-Christine BarraultLa surveillante chef | La surveillante chef |
 Annie GirardotMarthe | Marthe |
 Fanny BastienBrigitte | Brigitte |
 MilvaLucie Germon | Lucie Germon |
 Agnès SoralNicole Beck | Nicole Beck |
| CCorinne TouzetSabine | Sabine |
 Franci CamusAnnie | Annie |
 Élisabeth LafontIrene | Irene |
| CClaudine MavrosColette | Colette |
| EEdith WinklerSuzanne | Suzanne |
| SSophie MinetMarion | Marion |
 Manuela GouraryDanseuse | Danseuse |
| RRaymonde HeudelineSurveillante | Surveillante |