In the late 1950s in Châteauroux, a modest office worker, Rachel, Virginie Efira falls for Philippe Arnold, a brilliant young man born to a wealthy bourgeois family. Their brief but passionate affair yields a daughter, Chantal Mélina Garcia, and Rachel must raise her alone after Philippe leaves and refuses to marry outside his class or religion. Yet Chantal becomes a bright spark of joy in Rachel’s life, a constant source of happiness that keeps her going despite the social pressures of the time.
When Philippe announces that he will marry a younger, wealthy German woman and that they are having a child together, Rachel is crushed and even expels him from the house. Philippe, however, continues to pursue a sexual relationship with Rachel, and she endures his cynicism and amoral behavior, choosing to overlook his shortcomings for the sake of their daughter. The three of them cross paths again in Strasbourg when Chantal is fourteen. Rachel launches a campaign for Philippe to acknowledge his daughter legally, which would grant her a right to a name and a share in his legacy, a promise he had once made in a letter but later recants. In a tense turn, he finally concedes, and Chantal’s surname is changed to Arnold as she and Rachel begin anew in Reims.
During a later visit, Philippe offers monthly payments and seeks a greater role in Chantal’s life, but his ongoing affair with Rachel strains their relationship. The tension grows when Chantal, now a teenager, begins a romance with Franck Gaël Kamilindi, an older man whom Rachel herself had once liked. Franck privately warns Rachel that Chantal should not see her father, because Philippe has long abused her. Rachel steps back from confronting her daughter, and Chantal distances herself from her father—though that estrangement is not permanent.
As time passes, Rachel becomes middle-aged and marries a man named Alain Simon Bakhouche, while Philippe battles dementia and later Alzheimer’s disease, his death eventually reported to Chantal. By this point, Chantal is thirty‑three, living in Paris, emotionally scarred and in a fragile relationship, and she has a daughter of her own. She carries unjustified anger toward her mother and pushes her away.
Years later, in Paris, mother and daughter finally reconnect. They confront the decades-long cycle of sexual abuse, humiliation, shame, and control that Philippe exercised over them both. The film closes on a note of painful, earned reconciliation, as they begin to confront the past together and imagine a future where their bond can begin to heal what was broken.