What is the plot of the movie 'The Killer'? Who are the actors in 'The Killer'?

David Fincher directs "The Killer," a film centered on a professional assassin adrift in a world devoid of moral clarity. The movie, scripted by Andrew Kevin Walker, delves into the life of a solitary, cold, and remorseless man who functions as a ruthless agent of death.

As the assassin travels the globe executing his assignments, the lines of his actions blur. The narrative takes a turn when he begins to experience pangs of conscience and wavers on his commitment to this violent existence. His internal struggle intensifies after he botches a crucial mission, plunging him into a difficult and uncertain period.

The film features a notable cast, including Michael Fassbender in the lead role, alongside Tilda Swinton, Arliss Howard, Charles Parnell, Kerry O'Malley, Sophie Charlotte, Emiliano Pernía, Gabriel Polanco, Sala Baker, and Endre Hules. "The Killer" has garnered an IMDb rating of 6.7 out of 10.