Emma is convinced that someone or something is haunting her, and she refuses to leave her house until she can piece the puzzle together, with the assistance of John Trevor (Lewis), a sympathetic detective. Eventually, Emma suspects her parents of hiding skeletons in the closet from the family's past and practicing magical rituals using Wicca symbols seemingly stole from satanism. As the clues pile up, she discovers that she once had a sister named Beth, who died twelve days after Emma was born. Emma realizes that this identical apparition may actually be Beth returning to life.