Lionel (
Alex Descas), a widower who drives
RER trains in metropolitan Paris, has raised his daughter Josephine (
Mati Diop) alone for many years. They have always shared a special bond and live a secure and contented life somewhat isolated from others, in an apartment building in a suburb of Paris. Josephine, an anthropology student, is now grown and has become a young woman, but she remains deeply devoted to her father. They have developed a loose family with some of the other residents of the building: Gabrielle (Nicole Dogue), a cab driver, who once had a love affair with Lionel; and Noé (
Grégoire Colin), a moody young man who lives with his cat and has feelings for Josephine. Noé leads a disorganised life and goes abroad often. Gabrielle appears to have feelings for Lionel and motherly feelings towards Josephine. However, both father and daughter are ambivalent toward more than a casual friendship with anyone outside their special relationship. While attending the retirement party for a colleague and friend, Lionel declines to try the customary feat of downing 35 shots of rum. His colleague appears to be lost without his job, and Lionel realises that time is moving on. He (Lionel) must find meaning and security in things other than his present life, lest he end up the same way. During an outing with Gabrielle and Noé, their car breaks down and the four friends take refuge in a closed bar. Noé shows his feelings for Josephine, and Lionel realises that she must eventually leave him. He knows that she needs to live her own life independent of him. It is subtly suggested that Josephine decides to marry Noé in a scene of her emotionally charged visit to Noé's apartment, after he also voices his intent to take a job in Gabon. When Lionel's former colleague commits
suicide on the RER tracks, Lionel has to stop his train when he comes across the body. The father and daughter then go on a long car trip to visit her mother's grave in Germany before her wedding. In the final scene, Josephine weds a nervous but happy Noé. At the party, Lionel successfully downs 35 shots of rum in celebration of the occasion. It is not clear whether he does so in joy or in sadness. He returns home to live alone. ==Cast==