In this classic Agatha Christie detective story, former diplomat Charles Hayward has returned from Cairo to London to become a private detective. When Aristide Leonides, a wealthy and ruthless tycoon, is poisoned in his own bed, Detective Hayward is invited to solve the crime. As the investigation deepens he must confront the shocking realization that one of the key suspects is Aristede's beautiful granddaughter, his employer and former lover; and must keep a clear head to navigate the sultry Sophia and the rest of her hostile family..