Arthur Conan Doyle’s tense, unsettlingly supernatural tale of obsession and controlAfter Austin Gilroy’s fiancée is hypnotised, he finds himself drawn into the orbit of the woman responsible – Miss Penclosa. Soon, disturbances begin to unsettle him: actions he cannot account for, thoughts that seem to come from elsewhere. As Penclosa’s hold over Gilroy tightens, he discovers how little control he has over his own mind.