Meg decides to commit suicide to escape the marriage to which her father intends her. She is saved by Jean-Pierre, another candidate for suicide, and Léon, a tramp who was just trying to reason with him. The trio then becomes inseparable and organizes a new life based on friendship and freedom.
Dédé de Montmartre, former king of the accordion, has become a bad boy who lives off drug trafficking and prostitution. He sets his sights on a young girl, fresh and naive, Odette, saleswoman at Galeries Lafayette. But he is touched by the charm of this midinette.
The tailors Moïse and Salomon Lévy decide to marry Mina, Salomon's daughter to a good match, to save themselves from the competition that Cohen makes for them. Mina will eventually succeed in marrying Pierre, from a marriage of love, without this harming the family business.
