 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.