Student Claire lives with her mother, Anne, and Sebastien — a young man Claire brought home out of pity who is now trying to seduce them both. At school, Claire meets Gregoire, who loans her a book by philosopher Soren Kierkegaard that makes the reader attracted to whoever gave it to them. Smitten with Gregoire, Claire passes the book on to her therapist, who then falls in love with her.
| Actor | Role |
|---|---|
 Chiara MastroianniClaire | Claire |
 Melvil PoupaudGregoire | Gregoire |
 Mathieu AmalricSebastien | Sebastien |
 Karin ViardCharlotte | Charlotte |
 Jean-Pierre LéaudHugo | Hugo |
 Hubert Saint-MacaryHubert | Hubert |
 Serge MerlinRobert | Robert |
 Danièle DubrouxAnne | Anne |
 Micheline PresleDiane | Diane |
 Jacques NolotPsychiatrist's Patient | Psychiatrist's Patient |
 Denis PodalydèsAccompanying Male Nurse | Accompanying Male Nurse |
| HHopi LebelMedical Student | Medical Student |
 Raghunath ManetIndian Musician | Indian Musician |
 Oury MilshteinPsychiatrist's Talking Patient | Psychiatrist's Talking Patient |