A student from an elementary school accidentally breaks the glass roof of his school. His comrades decide to support it by working during the summer holidays in order to pay for reconstruction.
Boudu es un vagabundo que se tira al Sena con intención de suicidarse, pero un librero Parisiense, Edouard Lestingois le rescata y le acoge en su casa. Boudu es adoptado por la familia, que intenta convertirlo en un señor respetable.
