Murder in the "Eastern Express"

The great detective of Erkul Poiro, who was in Istanbul, returns to England on the famous "Eastern Express", in which representatives of all possible nationalities go along with him. One of the passengers, an unpleasant American named Ratchett, suggests Poirot to become his bodyguard, because he believes that he should be killed. The famous Belgian brings herself up from this absurd request. And the next day, the American is found dead in their compartment, and the doors are closed, and the window is open. Poirot immediately takes up the investigation - and finds out that the compartment is full of all kinds of evidence indicating ... almost all passengers of the "Eastern Express". In addition, the train tightly stuck in snow drifts in a deserted place. Poirot needs to find the killer before the express continues its way