Joyce and Ava are plunged into the fog-shrouded moors of Devonshire as they open Sir Arthur Conan Doyle’s The Hound of the Baskervilles. What begins as a chilling ghost story about a spectral hound quickly evolves into a high-stakes masterclass in deduction. Together, they must help Sherlock Holmes untangle a web of ancient curses and very modern greed before the Great Grimpen Mire claims its next victim.