Our story begins with psychic investigator Cosmo Thor meeting Madame Luna, a fortune teller down on her luck. Madame Luna shortly tries to make desperate contact with Thor, but without success. Concerned, Thor consults his friend, Hugh Collier of Scotland Yard, and learns that Madame Luna may be a woman found dead from a fall from a cliff in Devon. But what in the world was Madame Luna doing in Devon, if the dead woman indeed was she? Thor's investigation leads him to Belgrave Manor, a country house of ill-favoured reputation. The house belongs to wealthy London philanthropist Mrs. Maulfrey, the same woman who happens to have taken custody of Madame Luna's young daughter. After a tense visit, Hugh Collier is on hand to pick up the threads in what turns out to be a remarkably sinister case, and one in which Hugh himself will be imperilled before the dénouement. An impressive tale of outré mystery and lurid crime, with a cast of compelling characters, was originally published in 1935. This new edition features an introduction by crime fiction historian Curtis Evans.