Ce film hors-norme est librement adapté de l'histoire des Treize de Balzac. Autour du travail d'une troupe de comédiens, des personnages laissent entendre l'existence d'une société secrète. Dans sa version longue, il est généralement exploité avec pour sous-titre globale "Noli me tangere" (ne me touche pas, en latin) en 8 films d'1h30 environ, : 1. de Lili à Thomas 2. de Thomas à Frédérique 3. de Frédérique à Sarah 4. de Sarah à Colin 5. de Colin à Pauline 6. de Pauline à Émilie 7. d’Émilie à Lucie 8. de Lucie à Marie

How to become a man when your mother and your closed circle have decided otherwise? This is the challenge Guillaume took up. The film recounts Guillaume's tragicomic battle from the young age of eight, as he adopts the role of a girl then of a homosexual... until, aged 30, he meets the woman who, after his mother, will become the other woman in his life. Beyond this story of a heterosexual coming-out, the film tells the tale of an actor who never stopped loving women, maybe even a little too much.

Frederic leads a bourgeois life; he is a partner in a small Paris office and is happily married to Helene, a teacher expecting her second child. In the afternoons, Frederic daydreams about other women, but has no intention of taking any action. One day, Chloe, who had been a mistress of an old friend, begins dropping by his office. They meet as friends, irregularly in the afternoons, till eventually Chloe decides to seduce Frederic, causing him a moral dilemma.

The Catholic Jean-Louis runs into an old friend, the Marxist Vidal, in Clermont-Ferrand around Christmas. Vidal introduces Jean-Louis to the modestly libertine, recently divorced Maud and the three engage in conversation on religion, atheism, love, morality and Blaise Pascal's life and writings on philosophy, faith and mathematics. Jean-Louis ends up spending a night at Maud's. Jean-Louis' Catholic views on marriage, fidelity and obligation make his situation a dilemma, as he has already, at the very beginning of the film, proclaimed his love for a young woman whom, however, he has never yet spoken to.

Beautiful young housewife Séverine Serizy cannot reconcile her masochistic fantasies with her everyday life alongside dutiful husband Pierre. When her lovestruck friend Henri mentions a secretive high-class brothel run by Madame Anais, Séverine begins to work there during the day under the name Belle de Jour. But when one of her clients grows possessive, she must try to go back to her normal life.