When the elderly Allan Armadale makes a terrible confession on his death-bed, he has little idea of the repercussions to come, for the secret he reveals involves the mysterious Lydia Gwilt: flame-haired temptress, bigamist, laudanum addict and husband-poisoner. Her malicious intrigues fuel the plot of this gripping melodrama: a tale of confused identities, inherited curses, romantic rivalries, espionage, money-and murder.