Christine Penmark, a housewife, moves into a new town with her husband Kenneth and daughter Rhoda. Christine has always thought her daughter was very peculiar; while always polite, courteous, and charming in public, Rhoda has a cold, apathetic, and calculating quality to her personality which her mother finds very disturbing in a child. As Christine notices the strange and horrible things that happen in the proximity of her daughter, she comes to realize that Rhoda is the very definition of evil.
