Michel Rob

Dr Pierre Richard learns that his wife Madeleine has been unfaithful for years. This comes as a shock after a decade of supposedly wedded bliss. Back home, he demands answers, and a long night of explanations ensues.

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

A railway worker, Leguignon, and his wife are forced to move into a house located in a shaggy part of town. What Leguignon doesn't know is that a group of children have discovered a treasure and keeps it stored in the house. Trouble ensues when he discovers the cache and tries to claim it as his own.

Madeleine Lebeau, a woman who charges for her easy virtue, has a plan that has some of her customers paying more than others; she tells them she is pregnant and, to avoid complications, the men pay her money and don't hang around for the birth. Yves Furet, a shiftless gambler, who not only encourages her in her business ventures but is also her fiancée, shares the fruit of her non-labor. She latches onto a wealthy widower, Henri Vilbert, who throws her a curve-ball when, after she tells him she is pregnant, he is overjoyed as he has fallen in love with her and is looking forward to becoming a father. She plays along for a while, but becomes ashamed when she sees how Vilbert is devoting his whole life to a child that she isn't carrying. She fakes a miscarriage and his kindness makes her feel guilty and she confesses, but he doesn't believe her. So she tries another plan.

Loiseau the pharmacist mistakenly mixes potassium cyanide into a batch of cough syrup and sells five bottles. With horror he discovers his mistake and sets out to find the buyers. He finds only four. The fifth, not a regular customer, comes back to the pharmacy...

A specialist in the fight against cancer, a young doctor finds himself suffering from a terrible illness.

The ordeal of Françoise who, deceived by her husband, sees her dying child. After a few events in the backdrop of a festival, the husband returns, she pushes him away, driving him to suicide. Another man she thinks she loves is already married.