You never can tell. Jean had always been one of the most confirmed bachelors that kept swearing to anyone that would listen he would never put a ring on a female finger. But that was before he met Juliette, a capricious but irresistibly lovely young woman. Well, what else can you do when you fall dead in love with a creature of the kind? And too bad if their honeymoon proved catastrophic. To say nothing of their housing problems : what to do when neither husband nor wife has any money? How to build one's love nest when the housing crisis rages? How to get by when your wife has luxury tastes?

The daughter of an industrialist takes an interest in the workers and tries to improve their lot. She avoids a strike, and falls in love with an engineer.

Anne-Marie meets three men bearing the first name of Ludovic. Each of them has a very different character than the other two. The young woman will find great love with one of them.

The film is a 125-minute, black-and-white biography of French priest and diplomat Charles Maurice de Talleyrand-Périgord (1754–1838), who served for 50 years under five different French regimes: the Absolute Monarchy, the Revolution, the Consulate, the Empire, and the Constitutional Monarchy. Its title comes from one of the main historical nicknames for Talleyrand, that he shares with demon king Asmodeus and English poet Lord Byron.

For fun and to dazzle his wife, the novelist Morgan steals a ring and gets rid of it in the costume jewelry section of a supermarket. Sophie buys the diamond, which forces the novelist to embark on crazy adventures to recover the jewel.

Having become famous, a painter marries his model whom he soon brings to despair by deceiving her.

Catherine, 18, loved Jean, a young accountant, who loved her in return. And yet, one morning, two policemen find their dead bodies on a stretch of waste ground. The case is obvious: the two young people have killed themselves. But why? Chief Inspector Ernest Plonche, feeling upset, decides to investigate personally.

Paul Braconnier and his wife Blandine only have one thing in mind: to find a way to kill each other without risk. After listening to a radio show, Paul decides to go to Paris to meet a famous lawyer in the acquittal of the murderers. He tells the lawyer that he killed his wife. The lawyer asks Paul to reconstruct the circumstances of the drama. Without knowing it, he explains, in spite of himself, the way for Paul to murder his wife by putting the odds on his side to avoid death penalty or even be released...

A woman in Paris hires a taxi driver to locate her ex-lover, father to her newborn child, who left her without leaving an address.

Fates of multiple otherwise disconnected characters intertwine miraculously under the sky of Paris. And it all happens in one day.