A demented killer stalks the streets, preying on young, handicapped women. Where will he strike next? Whom will the next victim be? The answers might surprise you…because they're always another twist to The Spiral Staircase.
Beautiful young mute Helen is a domestic worker for old ailing Mrs. Warren. Mrs. Warren's two sons, Albert (a professor) and womanizing impudent Steven, also live in the Warren mansion. Mrs. Warren becomes concerned for Helen's safety when a rash of murders involving 'women with afflictions' hits the neighborhood. She implores her physician, Dr. Parry, to take Helen away for her own safety. When another murder occurs inside the Warren mansion, it becomes obvious that Helen is in danger.