In the summer of 1979, gay porn producer Anne sets out to film her most ambitious film yet, but her actors are picked off, one by one, by a mysterious killer.

A "three people relationship" with a pact involving a terrible past. The pact concerns France, Anne and Pierre.

Imagine a slightly dilapidated three star hotel in the tenth arrondissement run by a very distinguished lady with moral fibre and panache, Mrs. Coppercage. Alongside tourists visiting Paris, Mrs. Coppercage rents three rooms to three women at a monthly rate. Each woman is marked by life, yet they go on as best they can, never closing their eyes to the world around them, or to the men who impatiently await them. Faubourg Saint Martin opens as a love story and ends like a song as shots ring out and punctuate the chorus.

Simone, a leather-clad porn theater worker, spends her shifts bantering with her coworker and observing eccentric customers in the cinema’s lobby. Tonight, she clocks out and heads off to meet her girlfriend, a waitress at a lesbian club. Later, she’ll encounter a lonely man on the prowl.

Two lesbians are victims of a break-in. Together with their clan of friends, they undertake a wild investigation, with suspense and rigour, to arrive at the truth. Sensitivities are aroused around life choices, and political choices. Questions of morality comically embellished with words of abuse falling into drunkenness.

How couples unite, interact, separate, reunite or find other partners. The links in this chain begin with Christian and Nathalie, who are coworkers and friends. Christian discovers that his lover Francoise is having an affair, and Nathalie advises him to give his feelings some time to heal, about two years. Nathalie is angry that her lover Mark does not want to see her more often, while he is jealous of the men in her past. Meanwhile, Francoise finds out that her new lover is not that interested in her anymore, and after they split, she encounters him with someone else. As romance fluctuates like the lunar tides, the myth of one true love takes a beating.

This slice-of-life drama about an elderly couple and their estranged son covers twenty-four fateful hours that begin with the usual daily routine for the retired pair of former teachers (Micheline Presle and Claude Pieplu). Then their son telephones to say he will be coming over with his girlfriend and the normal pattern is changed, as he visits them rarely. While the mother is obsequious to her son when he arrives, past hurts and resentments bubble up during lunch, making it difficult for the son to tell them he is getting married. This is news enough, but the effect that announcement has on the son and his fiancée is unexpected and events later on in the day take a turn for the worse.

Ginette is at phone with the famous Rachah Rangers, who hosts a daily radio program. She talks about her break with Richard, her various relationship problems, her desires, fears and reproaches. Her friend, Simone Barbes, advised her to live, urgently, a new relationship ...

Marcel is his garage's handyman. With the smell of grease and petrol wafting through the air, alternating between night watchman, petrol pump attendant and confidant, he is visited every evening by the slightly lost night owls who pass by. They all confide in him about their daily troubles.