Melanie Gordonstone, a cherubic six-year-old, was Daddy's favourite in every way. So Margaret, her jealous 12-year-old sister, drowned her in a backyard pool. Inexperience led young Detective Bliss to attribute the girl's death to accident, but Melanie's mother drives herself mad believing her husband to be the killer. Margaret taunts her deranged mother for 10 years before putting her out of her misery, hanging her from a chandelier in a faked suicide. Now, frightened for his own safety, Margaret's father sends her to live in a remote Canadian community where he believes she can do no further damage - big mistake!.