Mais qui donc m'a fait ce bébé ?

Three young men - Jacques, Pierre, and Michel - share an apartment in Paris, and have many girlfriends and parties. Once, during a party, a friend of Jacques' tells him he has a quite compromising package to deliver, and asks him if he can leave it discreetly at their place. Jacques agrees and, as he works as a steward, flies away for a one-month trip in Japan, telling Pierre and Michel about the package. Then, one of Jacques' former girlfriends drops a baby before their door, making Pierre and Michel believing it is the package they are waiting for. Their lives are then completely changed.

38-year-old Alice has everything to become the next editor-in-chief of Rebelle magazine except for her uptight image. But when the young and charming Balthazar, barely 20, crosses Alice's path, she realizes that he holds the key to her promotion.

At 55, Anne is finally enjoying her freedom after her children leave home. But everything changes when her 23-year-old daughter, Louise, moves back in with her after a professional and romantic failure. And to make matters worse, her son, Théo, announces that she's going to be a grandmother! Anne realizes that life never goes as planned and that, at any age, we are still learning to grow up.

Lauren, a lovely 29-year-old it-girl, tries to break into the world of fashion by skimming Parisian parties. Olivia, a 28-year-old psychologist, has two obsessions: to save the confectionery of her parents, and to find her ideal husband. At the age of 26, Salma, a fiery young history teacher, still lives with her mother in the suburbs. Their roads have no reason to cross - until the day when, on the death of their biological father that they never knew, they inherit together a splendid Parisian apartment. For these three sisters who have nothing in common, cohabitation will prove to be explosive, to say the least.

Set in 1992, a manager Vincent has to run a children's holiday camp for three weeks and to face the unexpected concerning the place, his colleagues, various problems linked to children about the rooms, trips, their belongings...

A visa problem forces Adrien back to Paris after 15 years in Senegal with his wife Aminata. Her cousin Sékou, now distanced from his Senegalese origins, takes in Adrien. As Adrien awaits his return, Sékou shows him France, sparking surprises.

Eddie, Dov, and Yvan are back, still working in Paris' Sentier textile district, This time they're confronting the high-stakes world of large distribution after striking a deal with Eurodiscount, a European hypermarket chain.

Henri is a middle-aged writer with fading inspiration who has published nothing worthy of note in years. Feeling increasingly misunderstood by his wife and four grown up deadbeat kids, he dreams of running away to start over again. Yet when he discovers an unattractive, bad-mannered dog in his garden, he decides to adopt him and both start developing an unexpected friendship that inevitably upsets Henri’s family and neighbors.

Annie lives in harmony with her husband Laurent and her children: the sensitive elders Maximilien and César; the younger Antoine whom Poupi, never-complaining teen, helps raising him. But a positive pregnancy test will disturb the harmony.

Valentin D is a hot designer architect who claims to be an orphan because he is too ashamed to admit he is the son of working-class scrap metal merchants from the north of France.