Jacques, a young man with artistic aspirations, spends four nights wandering Paris with a young woman, whom he rescued from suicide.

In this poetic slice-of-life film that reveals the problems and needs of a group of lowlife characters, unwed mother Vivaine (Dominique Labourier) falls in love with working-class youth Francois (Patrick Chesnais) who has a shady past. Albert (Philippe Noiret), a no-good insurance con-artist, poses for many years as Francois' friend, but tragedy ensues when Albert comes between the lovers, and Francois and Albert resort to physical violence to settle their differences.

The Happines Boys Billy Jones and Earnie Hare are invited to a party, but separate themselves from the rest of the guests, so they can not be urged to perform. However, they are watching the other guests from radio doing their stuff: song team Reece & Dunn, as well as the Funnyboners are singing, Smith Ballew and Frances Langford are exchanging love songs, Arthur Tracy tries his luck with a girl, just to find out that she prefers Bing Crosby and 4 orchestra leaders are trying to find out, who the best conductor is, by conducting a piece of recorded music....

Aimless young Alexandre juggles his relationships with his girlfriend, Marie, and a casual lover named Veronika. Marie becomes increasingly jealous of Alexandre's fling with Veronika and as the trio continues their unsustainable affair, the emotional stakes get higher, leading to conflict and unhappiness.