This film receives a 2-rating because 2/3's of it is very good--the first 2/3's is very good while the last 1/3 is fatuous and uninteresting. You feel cheated. Nevertheless, I recommend you see it in order to educate your taste.
An American university professor and writer goes to Paris where his divorced wife and 6 year old daughter are. She calls the police because she has an "exclusion order" against him. He sees his daughter, even talks to her, but flees when the police arrive. On a bus, he falls asleep and someone steals his suitcase. He has almost no money on him and no job and no place to stay. He enters a sleazy bar/hotel in a low-class part of Paris, and asks the pretty blonde Polish waitress for a coffee and a room. She directs him to Sezer, a Middle-Eastern proprietor, who takes his passport while renting him a room without advance payment. Later, Sezer even gives him a job sitting in a kind of "storage unit office" and letting men in a door by pressing codes. The men perhaps are criminals... One day he goes to a bookstore where the bookstore owner recognizes him as the writer he is and invites him to a party. He goes and sees an attractive woman. She invites him to her apartment. He goes. They make love. After that, he also makes love to the Polish girl, who, it turns out is the lover of Sezer, the hotel proprietor. A large African man, his next door neighbor in the hotel who is fecally careless, threatens him, telling the writer he has seen him making love to Sezer's Polish girl and to give him $1,000 or die. So we see he has a mysterious job, two girlfriends, a cute charming daughter, an ex-wife who is French, a menacing big tough neighbor, and an equally menacing boss who is probably a criminal. We also see a part of Paris not usually in films. We are interested in what will become of these relationships...
Then, someone murders the African by nailing him through the mouth with the toilet brush, sticking it through his mouth and through, presumably, his throat. Our writer is arrested, because he is a likely suspect. During the interrogation, he gives an alibi: he was at the house of the attractive older woman he met at the Writers' Party.
That is about 2/3's of the film. The interrogator investigates; returns and tells him the woman has been dead since 1991. What???
Now what we have been interested in (the relationships and how they will work out) has been tossed out and fresh meat brought in. The supernatural? A psychosis? Who cares?
I wanted to see what would happen to the realistically presented relations. There had been no psychotic behavior on the writer's part and nothing supernatural. No monsters, ghosts, or hallucinated delusions. No indication that the writer was suffering psychosis.
Really a bad job. What had been an entirely interesting story becomes a ho-hum silly mystery about a psychotic who's had no symptoms.