Sherlock Holmes receives a request for aid from Lord Cary, whose family home, Torre Abbey, is seemingly haunted. While skeptical, Holmes believes that the Carys are in danger, a belief that proves horrifyingly accurate when a household member dies mysteriously. As strange sightings and threatening apparitions become almost commonplace, Holmes and Watson must uncover the secrets of the abbey if they are to have any hope of protecting the living and avenging the dead.