The baron's son (Basil Rathbone) revives his father's monster (Boris Karloff) with help from a broken-necked shepherd called Ygor (Bela Lugosi).
Members of an estranged, upper-class family must pull together to repel masked home invaders who are trying to kill them.
Strange events plague a couple and their young daughter when they rent a secluded countryside house that has a dark past.