A well-off young woman decides to become a nun, joining a convent that rehabilitates female prisoners. Through their program, she meets a woman named Thérèse who refuses any help because she says she was innocent of the crime she was convicted for. After being released from prison, Thérèse murders the actual perpetrator of the crime and comes to seek sanctuary in the convent.
| Actor | Role |
|---|---|
 Renée FaureAnne-Marie Lamaury | Anne-Marie Lamaury |
 Jany HoltThérèse | Thérèse |
 SylviePrioress | Prioress |
 Mila ParélyMadeleine | Madeleine |
 Marie-Hélène DastéMother Saint-Jean | Mother Saint-Jean |
 Yolande LaffonMadame Lamaury | Madame Lamaury |
 Paula DehellyMother Dominique | Mother Dominique |
 Silvia MonfortAgnès | Agnès |
| GGilberte TerboisSister Marie-Josèphe | Sister Marie-Josèphe |
 Louis SeignerPrison director | Prison director |
 Georges ColinHead of the P.J. | Head of the P.J. |
 Geneviève MorelSister Berthe | Sister Berthe |
| CChristiane BarrySister Blaise | Sister Blaise |
 Jean MorelPolice inspector | Police inspector |
| JJacqueline ChampiNun | Nun |
 Madeleine ClervanneNot listed | Not listed |
 Andrée ClémentSister Élisabeth | Sister Élisabeth |
 Elisabeth HardyNun | Nun |
 Bernard LajarrigePrison guard | Prison guard |
| JJacqueline MarbauxNun | Nun |
 Claire OlivierNun | Nun |
 Madeleine RoussetNun | Nun |
| HHenri de Livry(uncredited) | (uncredited) |