After completing jail time for beating up a man who tried to seduce his mentally-handicapped teenage daughter, the Butcher wants to start life anew. He institutionalizes his daughter and moves to the Lille suburbs with his mistress, who promises him a new butcher shop. Learning that she lied, the Butcher returns to Paris to find his daughter.

Stressed and overworked, famous French movie star Michel Blanc is beginning to wear down, physically and mentally, from the pressure and demands of fame. Already in a fragile state of mind, strange events start to transpire all around him, and he gradually loses his grip. Taking the advice of a psychiatrist, Blanc retreats to the countryside with his friend Carole Bouquet, but Blanc still has not managed to escape all of his problems.

Aging beautician Angèle, already wounded by a long-ago romance, gets awkwardly dumped at a train station. Witnessing how she turns around a humiliating situation, younger sculptor Antoine becomes so smitten that he breaks up with his fiancée and sets out to win Angèle's heart. Meanwhile, Angèle attempts to quash the budding romance of her young co-worker, Marie, and a much older widowed client, despite their obvious rapport.

The film's title is a pun, the double meaning referencing both the "wrong genre" and a person with distasteful motives. Insecure novelist Martial Bok promotes his new sexy novel La Fille de Dos ("Girl Observed From the Rear") with a round of book-signings and talk-shows. When beautiful hat designer Camille buys the book, Martial follows her and spies on her as she reads his book and removes her clothing. It's the beginning of his obsession and also an inspiration. After Martial's live-in girlfriend Lucie establishes contact with Camille for real, Martial is able to type out another sexy manuscript.

Alphonse Dutilleux, a Paris Shoemaker, closes shop and makes his way to the Bois de Boulogne, the male pick-up and prostitution scene. His wife and his son are waiting for him for dinner...