Emily Inglethorp, the rich mistress of Styles Court manor, is found dead. Poisoned. Hercule Poirot is called upon to investigate the death by Captain Hastings, who is a guest at the manor. Though a retired detective, Poirot steps in to unravel the truth. Who could have killed her? And why? The husband who would inherit the wealth or her stepson? There are others who raise suspicion too. What do the clues add up to? A broken coffee cup, splash of candle grease and the name of the husband on Emily's dying lips. There is one way to find out and the master sleuth Poirot, the Belgian detective is sure to find out.