American writer Tom Ricks arrives in
Paris to be closer to his young daughter, who lives with his ex-wife. The divorce was prompted by Tom's mental illness, from which he has apparently recovered. After his possessions and money are stolen, he accepts a job as a night guard for Sezer, a local crime boss who owns a run-down hostel. Stationed in a basement office, his only task is to admit visitors who give the correct
password. The tranquility of the nights, he hopes, will help him focus on his new novel. Tom begins romance with Margit, a mysterious and elegant widow who sets strange rules to their meetings: she will only see him at her apartment in the
fifth arrondissement, at 5pm sharp, twice a week, and she forbids him to ask questions about her work or her past life. At the same time, Tom grows closer to Ania, the Polish barmaid at the hostel's café, who has literary interests and seeks out a copy of Tom's only published novel. Tom's relationship with Ania turns into a sexual affair, and he is blackmailed by Omar, another resident of the hostel, who threatens to reveal it to Sezer, who has a possessive relationship with Ania. Shortly afterward, Omar is found murdered, and the police hold Tom as a suspect, but release him the next day after arresting Sezer. However, when he gives Margit as his alibi for the time of the murder, he is told that Margit Kahn committed suicide in 1991 after killing the man who ran over her daughter. Tom goes to Ania, but they are interrupted by the police, who inform Tom that his daughter has gone missing. Distraught, Tom returns to talk to Margit, though he now knows she is a figment of his imagination. Margit tells him to leave his wife, daughter, and Ania behind and be with her forever, but Tom demands to know what happened to his daughter. Tom's daughter is eventually found wandering in the forest, and is reunited with her mother. Ania waits for Tom at the cafè, but he never arrives. After discarding most of a letter he had been writing to his daughter, Tom ascends the stairs to the apartment in the 5th once again, where the door opens and a bright light engulfs him. ==Cast==