At Stanner Hall, a Victorian mansion-turned-hotel, Ben Foley hosts murder-mystery weekends and strives to prove that his hotel is the house on which Arthur Conan Doyle based his immortal Baskerville Hall. As the days shorten and the weather worsens, Foley’s dabbling uncovers more than he can handle. For the history of Stanner Hall is linked not only to the Victorian fascination with spiritualism and the legacy of a terrifying medieval exorcism—but with a chain of deaths that is far from fictional.