Albert Durandal is unable to keep a job for more than a few days. The reason: he hums while working, which invariably irritates his superiors. He is not hired as a singer for all that, as no music producer is prepared to bet on him. At the moment he is as free as a (singing) bird and accepts to take care of Josette, the little daughter of Jeanne, his neighbor, who is sick and has to go to a sanitarium. One day, while walking down the street, he helps an old man who has an attack. The latter happens to be an influential millionaire. And with a heart of gold into the bargain : he helps Albert to make it in the singing career. And as Jeanne has recovered, he can marry her and adopt Josette.

François and Victor sell hard candy at the fun fair. They also bring up Gisèle, a one-year-old child they found by the side of the road. Although the two men are often at each other's throats they are the best friends, getting on well with the other fairground people. But when they defend Lisa, the fortune teller's daughter against Dédé, a thug who pesters her, they provoke his anger. Dédé sets fire to the two friends' stand and they are forced to take the road.