<p>When the luxurious Blue Train arrives at Nice, a guard attempts to wake serene Ruth Kettering from her slumbers. But she will never wake again - for a heavy blow has killed her, disfiguring her features almost beyond recognition. What is more, her precious rubies are missing. </p> <p>The prime suspect is Ruth's estranged husband, Derek. Yet Hercule Poirot is not convinced, so he stages an eerie reenactment of the journey, complete with the murderer on board.</p>