One winter's night in France, four racists, J.P., Berthon, Barjout, and Rene set out to assault a local Arab man. The four follow the man to a vacant parking lot outside of an apartment building, but the car they are in suddenly starts smoking, causing them to crash into a phone booth. Barjout is knocked unconscious, but the others are unharmed. As the remaining three are about to attack the quite fearless (albeit defenseless) Arab, a woman in the building threatens to call the police. Impersonating a police-officer, J.P. heads into the building in an attempt to assuage the situaution. When an Afro-French denizen accuses J.P. of lying, he becomes angered and begins insulting him, only to discover that the black man is a police commissioner. Meanwhile, Berthon and Rene are keeping watch of the Arab. When Rene begins showing off his skills with nunchucks, one of the sticks detaches and hits Berthon in the head, knocking him out cold. As Rene tries to resuscitate Berthon, Barjout regains consciousness and decides to investigate what has happened. Upon seeing an apprehended J.P., Barjout threatens the black man at gunpoint. When J.P. tries to tell him that he is a commissioner, Barjout accidentally opens fire and kills J.P. Suddenly, he begins hearing the disembodied voices of Berthon and J.P., and now the Arab is speaking in Rene's voice. Barjout awakens, realizing the events were nothing more than a nightmare he had while waiting in the car. The film ends with the four men beating and presumably killing the helpless Arab man.

Source : Wikipedia