Le Samouraï (1967)

Set in Paris, "Le Samouraï" follows the story of a professional hitman named Jef Costello who meticulously plans his assassinations. When a hit goes awry, Jef finds himself caught in a web of deception and betrayal as he tries to dodge both the police and his employers. The film delves into themes of honor, identity, and the consequences of a solitary existence.