A terrified young baby-sitter...an incessantly ringing phone...and whispered threats set the stage for one of the most suspenseful chillers ever filmed. Carol Kane stars as the baby-sitter who is tormented by a series of ominous phone calls until a compulsive cop (Charles Durning) is brought on thescene to apprehend the psychotic killer. Seven years later however the nightmare begins again when the madman returns to mercilessly haunt Kane now a wife and mother. No longer a naive girl though still terrified but prepared she moves boldly to thwart the maniac's attack in scenes that culminate in a nerve-shattering conclusion.