The dark, forbidding edifice of Daemons' Roost does not readily yield its evil secrets. Here it was, according to legend, that a 19th-century sorcerer named Jacob Surtees would summon the powers of hell to terrorise and subjugate his victims. Contemporaneous accounts describe his impossible feats of telekinesis, which have remained unexplained to this day. 150 years after his death, the house is occupied by another equally macabre figure: veteran film director Nathan Clore, whose output of schlock horror movies in the 1970s generated its own brand of terror among cinema audiences. With his health now failing he has summoned home his stepdaughter Alison, to share with her, finally, the chilling truth of what happened to her family there when she was just a child.