Agatha Christie's Great Detectives Poirot and Marple

Sir John Willard, a noted archaeologist dies while excavating an Egyptian tomb. Lady Willard is worried because her son, Sir Guy Willard intends to carry on his father's work, regardless of the risks. She confides in Poirot that she is worried about the talk on the ground that a curse is at work at the site. Poirot agrees to protect her son.