4 and a half is the apartment occupied on the Plateau Mont-Royal in Montreal by a young couple. It is a chronicle of the daily life of the urban reality of 25-30 year olds: love, friendship, humor and tenderness.

In this tragicomedy, Toni is the director of a staged rendition of Othello in Montreal. It is a pet project of his, financed by his loving mafia uncle. Unbeknownst to him, the audiences are also rounded up (and paid) by the same uncle. Some of them have seen every performance of this tragic play, and are understandably bored, so when the backstage romantic shenanigans of the actors result in absurd situations onstage, the audience is delighted. There are a huge number of romantic situations going on in this film at the same time. One of them involves Gaston a somewhat world-weary jazz musician, and Florence, a glamorous middle-aged woman who has been pining for him for years. Another involves to members of the musician's jazz trio. Yet another involves the play's Desdemona, Soledad, the girlfriend of the man playing Othello, who can't keep his hands off his (female) dresser.

Helene is in love with a jerk. Jerome manipulates her like a puppet. Helene is not altogether blind to it but she's afraid to put her foot down.