|Michel Simon||Priape Boudu|
|Charles Granval||Édouard Lestingois|
|Marcelle Hainia||Emma Lestingois|
|Sévérine Lerczinska||Chloë Anne Marie|
Priape Boudu, a Parisian street tramp, decides to end his destitute life by plunging into the Seine. Hidebound middle-class bookshop owner Edouard Lestingois saves the tramp's life and brings him home for dinner. Touched by his story, Edouard and his wife, Emma, allow Boudu to live in their house so they can reform him into a model bourgeois citizen, but unexpected events unravel their well-intentioned plans.