A teenager finds her perfect life upended when she's stalked by a mysterious doppelganger who has her eyes set on assuming her identity.
The relationship of the teenager Fay Delussey with her family is deeply affected when her beloved father Don has multiple sclerosis and her mother Ann starts a love affair. Her teacher John invites Fay to perform the important role of Lady Macbeth in a school play and her schoolmate Monica Meldrum is jealous of her with the choice. Soon strange events happen to Fay and she believes that Monica is the responsible for the acts. But her father discloses a family secret about his ghost daughter.