Dartmoor. A wild, wet place in southwest England. An environment where it's easy to get lost and the rich, green earth can drag the strongest man to his end. In this treacherous land, a man runs for his life. Behind him chases a gigantic dog—a beast from his worst nightmares, a hound from hell. Only one person stands between him and a horrific death—the greatest detective of all time, Sherlock Holmes.