Mr. Bouton, a modest carpenter from Faubourg-Saint-Antoine, widower and father of Pinpin, a little boy, marries Mrs. Colombe, mother of Ninette, a little girl. Soon deceived and abandoned, he raises the two children alone. As an adult, Pinpin falls in love with Ninette, but she is in love with Gérard Garnier, whom she soon marries. The children gone, Bouton finds himself alone and one Christmas evening meets Mrs. Marie, a mother who raises her two children alone.

Abandoned children, left to their own devices and a life of danger, are adopted by a kind man.

In a college, three friends form a secret society. Their objective - going to America. One night, after one of their secret meetings, one of them sees a man coming out from a wall. The next day, after he talks about it, he disappears. Then, the second one vanishes. Are they gone to their dreams? That's when the art teacher is murdered. Suspicions now are too high so the third one decides to investigate.

After stealing a diamond from Mylène Demongeot, Richard hides it inside a guitar. But on returning to the music shop he discovers that the precious instrument has just been sold! The problem is complicated by the fact that five stars all bought the same model that morning...