Just after midnight, a snowstorm stops the Orient Express dead
in its tracks in the middle of Yugoslavia. The luxurious train is
surprisingly full for this time of year. But by morning there is
one passenger less. A 'respectable American gentleman' lies dead in
his compartment, stabbed a dozen times, his door locked from the
inside . . . Hercule Poirot is also aboard, having arrived in the
nick of time to claim a second-class compartment -- and the most
astounding case of his illustrious career.