Murder on the Orient Express

The great detective Hercule Poirot, who was in Istanbul, is returning to England on the famous "Orient Express," which seems to be carrying representatives of all possible nationalities. One of the passengers, an unpleasant American named Ratchett, asks Poirot to... be his bodyguard, as he believes he is going to be killed. The famous Belgian dismisses this absurd request. The next day, the American is found dead in his compartment, with the doors locked and the window open. Poirot immediately begins the investigation and discovers that the compartment is full of various clues pointing... practically to all the passengers of the "Orient Express." In addition, the train is completely stuck in snowdrifts in a deserted area. Poirot must find the murderer before the express can continue its journey...