The rigid principles of a devout Catholic man are challenged during a one-night stay with Maud, a divorced woman with an outsize personality. /// Devout Catholic Jean-Louis falls in love with a fellow parishioner but encounters temptation at a Christmas dinner hosted by the seductive Maud.
A woman invites all four men she loved in her life for the dinner of New Year's Eve at the same time and unites them all in her house. In sentimental flashbacks they recall the former times.
In the 1860s, Giorgio (Giraudeau), a young Italian soldier, is sent to a remote post, far away from his lover, Clara (Antonelli). He is lodged in the house of the colonel (Girotti). He becames friends with the colonel and the local doctor (Trintignant). Among the inhabitants of the house there is a strange young woman: Fosca (d'Obici) who is both unattractive and mad. However, she has a passion that Giorgio will have to cope with.
Friends of a recently deceased minor painter Jean-Baptiste take a train in Paris for Limoges, where he wished to be buried, and all the people on the train have their problems.