It all begins in the 1920s, when a blustering country policeman, Constable Michael Walsmear, literally punches his way into American photographer Charles Castle's London studio. Walsmear has what he claims are photographs of fairies. Sir Arthur Conan Doyle, whom Castle approaches to verify the pictures, offers a large sum of money to have Walsmear's photographs destroyed. But even more than cash, Castle wants the truth. His quest takes him to Burkinwell,...