A cold and mysterious new security guard for a Los Angeles cash truck company surprises his co-workers when he unleashes precision skills during a heist. The crew is left wondering who he is and where he came from. Soon, the marksman's ultimate motive becomes clear as he takes dramatic and irrevocable steps to settle a score.

Vigilante, a small armored truck company, is in full crisis mode. Victim of three violent hold-ups in a year, which left no survivors, the company is on the verge of bankruptcy and its employees are extremely worried. Some even suggest a complicity between the robbers and the firm. It is in this difficult context that a man, Alexandre Demarre, one morning presents himself to start his first day of work at Vigilante.