Sami, Tacchini, Yaya and Kader are four small-time crooks from the suburbs of Paris. After a failed robbery, their boss, Carlito, sends them to Canada to spy on his fiancée. There, they are mistaken for a band of professional killers and are hired to assassinate the heiress Léonore de Segonzac...

One evening, after a theatrical performance, the costume designer of the play that has just ended is offered a lucrative project: to become the President of the wardrobe of a rich prince. Now, the prince in question happens to be none other than Lucifer.

Yakuza Naoki Sando discovers his daughter Hiroko in bed with his adopted son Kohji. Three years later, Kohji is working the streets as a hustler, still yearning for a way to earn his estranged father's approval to continue his borderline incestuous relationship. Hiroko sees a way back to her brother's arms when Sando's shady colleague Marc Tanner absconds to Canada with gambling funds destined for the big boss. Presumably with her father's permission, she calls Kohji and tells him to hurry to Montréal, recover the money and kill Tanner.

Police detective Jacques Laniel's life becomes a nightmare the day drive-by shootists gun down his partner Thomas Colin. His colleagues make matters worse by blaming him for the death, and after his wife leaves him, Laniel decides to quit the force and launch a private investigation into Colin's murder. Soon afterward, Laniel finds the bullet-riddled body of famed author and literature professor Zachary Osborne tied to his car hood. The professor's wife hires Laniel to solve the murder, but what the detective finds is ugly: Osborne was a part of a lucrative land-speculation deal that involved the sale of a crumbling old rectory that had been turned into a halfway house called the Haven of the Monsters. The name is apt, for all the residents are convicted killers who were given inordinately light sentences. When Lanier starts questioning the Haven's tenants and their crimes are revealed via flashback, it takes on the character of a David Lynch production.