Agatha Christie's 'Ordeal by Innocence' is a compelling psychological mystery that explores the devastating impact of a murder accusation on a fractured family. When Dr. Arthur Calgary unexpectedly provides an alibi for the man convicted of murdering his mother, the Argyle family's fragile peace is shattered, forcing them to confront the chilling possibility that the real killer is still among them. As old wounds are reopened and long-buried secrets surface, the novel delves into themes of guilt, deception, and the corrosive nature of familial ties, keeping readers captivated and guessing until the very last, shocking revelation.