Alain runs Le Detour, a small cafe in Paris where Antoine works. Antoine is reunited with his sister Marie when she's released from prison; they are very close, perhaps abnormally so, but she's not aware that Antoine has fallen into cahoots with Stephane, who works as a waiter at another cafe. Damien, a local businessman, is pressuring Alain to expand Le Detour, and cut his nephew Xavier in for a percentage as a manager. While Alain waffles on Damien's proposal, Xavier offers Antoine a chance to make some money under the table by delivering some drugs to a cadre of dealers. Antoine makes the drop and picks up the payment, but runs off with the money rather than bringing it back to Xavier, which proves to have tragic consequences for Antoine and his friends.

Joëlle, jeune fille simple et énergique, travaille comme coiffeuse pour Madame DELBARRE. Lorsque le Professeur Thibaud, grand spécialiste des os, lui demande de donner sa moelle osseuse en vue d'une greffe, à la condition de ne pas chercher à connaître le greffé, elle accepte sans hésiter. Mais la tentation est trop forte et elle mène l'enquête afin de découvrir la personne qui a bénéficié de la générosité de son geste. Il s'agit d'un beau jeune homme dont elle tombe immédiatement amoureuse...

A second-class horror movie has to be shown at Cannes Film Festival, but, before each screening, the projectionist is killed by a mysterious fellow, with hammer and sickle, just as it happens in the film to be shown.

2001 film by Jean-Pierre Améris