In 'Five Little Pigs', when painter Amyas Crale is murdered, his wife Caroline is accused of poisoning him and she is sent to the gallows. Fourteen years later, their daughter Lucy returns from Canada with a letter from her mother, declaring her innocence, written on the eve of her hanging. Poirot is called in to investigate. In 'Sad Cypress', Elinor Carlisle is accused of a double murder - her wealthy aunt and her love rival. Poirot believes she had the motive and the opportunity to administer the fatal poison on both occasions. But as he gets more involved in the case, an entirely different version of events are pieced together.