Nag is a prostitute who officiates in a red kimono on the boulevards of Marseille. While bringing a client home, she is attacked by Simon who was waiting for her in her stairwell. She seeks refuge with her mother, also a prostitute, who drives her away. Nag ends up in the hospital. Hervé, a nurse offers to host him. Nonna, the latter's grandmother, demands that she be taken to a retirement home immediately. Nag's mother dies and Simon, who is a police officer, investigates. Nag runs away from Hervé to go find his colleague and friend Leïla. She has her stay with an old friend in the retirement home where Nonna is staying. The two women are reconciled. In the meantime, Hervé got to know Rosine, whose legs are paralyzed. He offers her to go with him to Australia, but first, he spends a night of love with Nag whom he wants to pay.