All is finally safe and secure at Baskerville Hall. The legendary Hound from Hell has been shot and killed by Sherlock Holmes; the dog's master, Jack Stapleton, has been sucked down into the depths of the Grimpen Mire, and the case Dr. Watson chose to call "The Hound of the Baskervilles" for readers of The Strand Magazine is officially closed...or is it? Mysterious events and untimely deaths continue to swirl around the squire of Baskerville Hall, prompting a frightened Sir Henry to call upon the services of the great detective once again. Holmes and Watson return to the moor to save the last of the Baskervilles; but this time, they must also combat supernatural forces that were so quickly dismissed before. The question then becomes...how can they possibly succeed?