A violinist passes on to his daughter three rings which represent three passions of his romantic past, and urges her to save each for men who truly deserve one.She squanders them all on one man who is undeserving.

Micheline, who fled to Paris with the man she is in love with, finds herself on her own when he abandons her. She lands in a reformatory from which she manages to escape.

At the Vélodrome d'Hiver, at the height of the sports competitions, the director of the house is found murdered. We also stole the recipe for the show. A swarm of private detectives, second-hand sleuths, embark on the most diverse tracks. Arrests pile up and the chase continues amid the non-stop games. The culprit will however be caught, red-handed, by a young inspector wearing a handsome mask.

With the help of a social worker and Isabelle, Pierre, a delinquent influenced by Marcelle, undertakes a slow and difficult reintegration.

The "Védrines", whose head of family is a publisher, are well established in Paris. The "Pittuiti", on the other hand, are gypsies camping out in the suburbs. Young Zita belongs to the tribe and meets Théo Védrines, the publisher's son, a wild seducer. Zita is soon forced to tell her family that she is expecting a child. A scandal for the Pittuiti family, who instruct Zita's brother to apply the law of retaliation, Bruno must in turn seduce the pleasant Gisèle Védrines. And why not? But while Théo gradually becomes an anarchist, Bruno becomes more and more embourgeoise as Védrines discovers in him a real talent for writing. Still, Bruno and Gisèle will be as happy as Théo and Zita ever were.