Three half-brothers are reunited at their mother's funeral. After being told of their inheritance they quickly spend the money, only to find out that they will not receive it after all. The men grow closer while deciding how to proceed.
The film begins with a flashback from the titular character, Antoine. We are introduced to his fixation with female hairdressers which began at a young age. The film uses flashbacks throughout and there are frequent parallels drawn with the past. We are unsure what Antoine has done with his life, however, we know he has fulfilled his childhood ambition, to marry a hairdresser.
Odile is a business executive looking for a new, bigger apartment. Her younger sister Camille has just completed her doctoral thesis in history and is a Paris tour guide. Simon is a regular on Camille's tours because he's attracted to her. Camille has fallen for Marc, and they begin an affair. Nicolas is also looking for an apartment, since he hopes to eventually have his family join him in Paris.
