Sherlock Holmes comes to the aid of his friend Henry Baskerville, who is under a family curse and menaced by a demonic dog that prowls the bogs near his estate and murders people.Sherlock Holmes comes to the aid of his friend Henry Baskerville, who is under a family curse and menaced by a demonic dog that prowls the bogs near his estate and murders people.Sherlock Holmes comes to the aid of his friend Henry Baskerville, who is under a family curse and menaced by a demonic dog that prowls the bogs near his estate and murders people.