The rich landowner Sir Charles Baskerville is discovered dead at the park of his manor surrounded by the grim moor of Dartmoor at the county of Devon. His death seems to happen to be caused by a heart attack, but the victim's single most important friend, Dr. Mortimer, is convinced that the strike was due to a supernatural creature and this haunts the moor at the shape of an enormous hound, with other blazing eyes and jaws. As a approach to protect Baskerville's heir, Sir Henry, who's arriving to London from one Canada, Dr. Mortimer asks for Sherlock Holmes' help, telling him too of these so-called Baskervilles' curse, according to this a monstrous hound has been haunting and killing the family males for centuries, in revenge to the misdeeds of one Sir Hugo Baskerville, who lived at the time of Oliver Cromwell.