Sherlock Holmes and Dr. Watson are visited by Dr. Mortimer seeking help regarding recent strange events on the Baskerville estate. He recounts the legend of a cursed hound that haunts the Baskervilles. They agree to investigate when the new heir, Sir Henry, arrives. At the estate, strange occurrences continue and Sir Henry is eventually attacked by the hound. Through his investigation, Holmes discovers the hound is part of a plot by the neighbor, Mr. Stapleton, to inherit the estate as he is actually a Baskerville. Holmes kills the hound and Stapleton is later found dead, having escaped into the Grimpen Mire bog.