From a basement office in London, Sebastian Becker investigates wealthy eccentrics whose dubious mental health may render them unable to manage their own affairs. His interview with rich landowner Sir Owain Lancaster, whose sanity has been in question since a disastrous scientific adventure in the Amazon killed his family and colleagues, coincides with the disappearance of two young local girls. When the children are found slain, Lancaster claims that the same dark forces that devastated his family have followed him home. Sebastian Becker's search for answers brings him face to face with madmen and monsters, both imagined and real; confronting immense danger in his hunt for the truth, he explores murder, tragedy, and the tempestuous depths of his own mind.