Since the death of his son murdered by accident by thugs, Daniel Munoz, a former thug, has decided to take the law into his own hands. He refuses the help of his brother Thomas, an arms dealer. Gaetan Veron, a criminal police officer, careerist and unscrupulous, convinces Thomas to reveal to him the place of Daniel's next action. Thomas, unaware of his younger brother's turnaround, finds himself face-to-face with him.