Gaby, the singer of the "Raymond's Jazz" band, leads Maurice, one of the musicians, to believe that, following a night he spent with her in the hay, he is the father of her child. In fact, the baby is neither his nor hers. He is the son of Madeleine, a young war widow who has entrusted him to her friend Gaby until she is allotted a flat. One day, Maurice happens to meet Madeleine and falls in love with her but he does not dare to confess his "paternity" to her. Fortunately the misunderstanding is clarified and Maurice can at the same time marry Madeleine and adopt her kid.
| Actor | Role |
|---|---|
 Jacqueline GauthierGaby | Gaby |
 Claude DauphinMaurice | Maurice |
 Pierre DestaillesFernand | Fernand |
 Jean GavenRobert | Robert |
 Renaud MaryRaymond | Raymond |
 Albert BroquinThe tramp at the Gare de Lyon | The tramp at the Gare de Lyon |
 Jean CarmetA man of Laurent | A man of Laurent |
| HHenri de LivryNot listed | Not listed |
 Mona DolThe brewery cashier | The brewery cashier |
| CCharlotte EcardThe farmer | The farmer |
| JJean GabertNot listed | Not listed |
 Geneviève MorelThe farm maid | The farm maid |
 Félix OudartLéon | Léon |
 Gisèle PascalMadeleine | Madeleine |
 SinoëlThe owner of the bookstore | The owner of the bookstore |
 Roger VincentGaston, the server of the brewery | Gaston, the server of the brewery |
 Jeanne VéniatThe helpful passenger on the train | The helpful passenger on the train |
 Charles BouillaudThe toy merchant (uncredited) | The toy merchant (uncredited) |