1889. The First Terror. A prep school pupil is found drowned. Could this be the fulfilment of a witch's curse? 1890. The Second Terror. A wealthy man dies of a heart attack. Was he really frightened to death by ghosts? 1894. The Third Terror. A body is discovered hideously ravaged. Is the culprit a cannibal? These three linked crimes test Sherlock Holmes's deductive powers to the limit.