Jeremy Hartwood has committed suicide in his Louisiana mansion, Derceto. You take the role of either Edward Carnby, a private investigator, or Emily Hartwood, Jeremy's niece, and investigate the suspicious death. The three-floor mansion is reputed to be haunted by its eccentric past owner. Very quickly, you realise that it is. Warped rats, zombies, and giant worms are among the foes who are after you, and you must somehow escape.