Franck Poupart is a quirky, neurotic door-to-door salesman in the sinister suburbs of Paris. He meets Mona, a young woman who has been forced into prostitution by her own aunt. Franck wants to change his life and save Mona from her situation. However, he soon realizes that murder is the only solution he can find to achieve his goal. The movie is very gloomy, with a dismal atmosphere and unsettling characters. It's not for the faint of heart.