Does the dark night of Dartmoor hide the legendary Hound of the Baskervilles? Who is the Man on the Tor? Are there two men hiding on the moor? Where is the convict from the prison at Princetown? Why does Barrymore the butler keep watch at the window? Why does Stapleton the naturalist stay so close to his sister? What is the shameful secret of the beautiful Mrs Laura Lyons? Why did Sir Charles walk away from the house, not towards it? Has the Hound come back to hunt Sir Henry? And will the sharp mind of Sherlock Holmes solve this complicated case? This story tells the answers.