Mr. and Mrs. Noblet run a boarding house on the French Riviera. One day, they are led by circumstances to welcome a little boy Pierre, whose father is in jail, into their home. Which makes Louise Noblet all the happier as she can't have children herself. But, after a while, Pierre's father is released from prison and reclaims his son... Time passes and Pierre, now a young adult, lives in Paris more or less on the wrong side of the law. He has a mistress, Nelly, who does not say no to other men's money... Louise, who still loves Pierre as her own son, wants only one thing - to help him get by.

Endre Julián, the young toy maker, lives a life of leisure. A man with a devious nature, he has his eye on the beautiful daughter Vera, the police inspector János Kántor. He takes her to his weekend home, but she realises that he is looking for an easy fling with her. An unfortunate accident causes Vera to disappear in deep water, and Endre notifies the police, telling Inspector Kántor the bad news. Eventually she is lucky enough to be found, but she doesn't want to hear anything about the toy maker. Endre's fatherly friend, Uncle Reményi, is very taken with the serious girl and decides to bring the young people together.