Franck Poupart is a door-to-door salesman in a troubled area on the outskirts of Paris. He has a tendency to be overly anxious and neurotic. One day, he crosses paths with Mona, a young girl who has been forced into prostitution by her own aunt. Deeply disturbed by her situation, Franck becomes determined to turn his life around and rescue Mona from her aunt's clutches.Driven by desperation, Franck starts contemplating extreme measures to achieve his goal. He becomes convinced that murder is the only way to free Mona from her torment. As he delves deeper into this dark and sinister plan, the movie takes on a somber and gloomy tone, reflecting the despair and uneasiness that permeate the characters' lives.The film portrays a bleak and desolate world, where hope seems elusive and redemption feels out of reach. Franck's character is particularly pathetic, consumed by his own insecurities and haunted by the weight of his actions. Despite his flaws, he is driven by a genuine desire to make a difference in Mona's life.Throughout the movie, the audience is confronted with the harsh realities of life in this sinister part of Paris. The film explores themes of exploitation, desperation, and the lengths one is willing to go to in order to protect the ones they care about.In the end, the movie serves as a haunting reminder of the dark underbelly of society and the tragic consequences that can arise from it. Franck's journey is a testament to the power of human connection and the lengths we are willing to go to in order to save those we love.