Le Samouraï (1967)

In Le Samouraï, a laconic and enigmatic hitman named Jef Costello becomes the target of a relentless police investigation after carrying out a murder. As he tries to evade capture and maintain his stoic demeanor, Jef finds himself facing treachery from within the criminal underworld. Set in the backdrop of Paris, this neo-noir crime drama explores themes of existential loneliness, loyalty, and coolness.