

Renowned parapsychologist Nandor Fodor travels to Isle of Man with his assistant Anne to investigate the case of Gef, the talking mongoose, believed to live at or around the farmstead of James Irving, local wealthy merchant. The mongoose has been reported by several people to be heard speaking to them, prophesying about future events, reciting poems, and even making telephone calls; although one report of hearing Gef's voice took place in the presence of Irving's daughter Voirrey, who is known to be a skilled ventriloquist.