Murder on the Orient Express is based on the classic novel by Agatha Christie and directed by Kenneth Branagh, who also portrays Poirot. The movie adaptation features an all-star cast including Penélope Cruz, Willem Dafoe, Judi Dench, Johnny Depp, Michelle Pfeiffer, and Daisy Ridley.
Set in the 1930s, the story follows Poirot as he boards the luxurious Orient Express train on a journey from Istanbul to Calais. During the journey, one of the passengers, American businessman Samuel Ratchett (Depp), is brutally murdered in his compartment. Poirot, widely regarded as the greatest detective in the world, takes it upon himself to solve the case.
As Poirot interrogates each passenger, he begins to unravel a complex web of secrets and lies. The suspects include a missionary (Cruz), a governess (Ridley), a professor (Dafoe), a widow (Pfeiffer), and several other eccentric characters. With no shortage of motives and evidence to sift through, Poirot must use all of his skills to identify the killer before the train reaches its destination.
As the investigation progresses, Poirot becomes increasingly conflicted about the morality of justice and mercy. Ultimately, he makes a decision that changes the course of the investigation and the lives of everyone on board the Orient Express. The movie ends with a surprising twist that reveals the true identity of the killer and leaves the audience with a sense of wonder and intrigue.