Three generations of the family of the Greek millionaire Aristide Leonides live together in England under the same roof: a huge and eccentric mansion with a crooked structure known as the “Crooked House.” The family's apparent harmony is abruptly shattered when the elderly patriarch is murdered in his bed, poisoned with an injection of his own eye medication (eserine).

Suspicion immediately falls on the occupants of the house, since the culprit must be a member of the family. Sophia Leonides, Aristide’s intelligent granddaughter, refuses to marry her fiancé, Charles Hayward, until the crime has been solved. Charles, the son of a high-ranking Scotland Yard official, infiltrates the family home to investigate the case privately before the police uncover the dark secrets of the dynasty.

Agatha Christie surprises us once again with her novel Crooked House, so mysterious and unsettling that the identity of the murderer remains unknown until the very end. Highly recommended.