Peter Ustinov stars as Agatha Christie's fastidious detective, Hercule Poirot, in this star-studded murder-mystery. Poirot is tying up some loose ends on a shimmeringly beautiful Adriatic island when he's dragged into a new case. In typical Christie style, everyone on the beach has a motive for the murder, and it's up to Poirot to find out whose morals took a murderous turn.