Sir Charles Baskerville is found dead on his own grounds, his face changed, with the prints of an enormous hound nearby. The heir arrives from Canada into a family legend that says the moor collects Baskervilles, and Holmes — too busy to leave London — sends his eyes instead. Doyle's most atmospheric case: fog, a lit window, something crying on the Grimpen Mire. You are Watson, working alone and further from Baker Street than you have ever been.