A very ill little girl having expressed the wish to live until Christmas, the whole neighborhood agrees to anticipate the celebration.

Jacques Montet, a successful crime story writer, has already written a hundred books and would like to call it quits now to devote himself to loftier writing. But his wife, a cold-hearted, money-minded, bossy woman won't allow. All the more as she is the one who supplies Jacques with the plots of his detective stories. When Jacques, yearning for true love, meets young, pretty Muriel, he can't stand the situation any longer. Fortunately - for him - the plot of the 101st detective story imagined by his wife is about a ... perfect crime. He simply has to follow her instructions to ... get rid of her. Everything goes according to plan until Jacques discovers a scary detail: the presence of a mysterious witness on the scene of the crime.

An accordionist playing in disreputable halls is mistaken for a gangster by a special envoy from the American crime syndicate in charge of investigating the French milieu. The American will prepare a hold-up with a gang of women specialized in scamming tourists. But the accordionist will make the hold-up fail and all the criminals will end up behind bars.

Jeanne, a little secretary dreaming of love, meets Alain, a reporter-photographer with a major daily newspaper. He takes her along on his professional nocturnal activities, during which she meets a host of celebrities. One evening, Alain takes photos of the kidnapping of a diplomat, and is followed by a mysterious individual who wants the film back. Alain falls in love with Jeanne. Their embrace is passionate. During the night, he manages to get rid of the follower, then receives a new assignment: to leave for Colombia as soon as possible. He sacrifices his love for Jeanne to his ambition, and she waits in vain for him before returning to her dull life.

Régine was married to Léon. She is currently engaged to Daniel, but still has feelings for Maurice. Young Georgette would like to find me a sister at any price, but her friend Magali would only commit herself for the right reason. Ferdinand is Léon's diligent valet. They all meet up at a winter sports resort. During a wild night, we witness the figures of a most successful quadrille.