At Christmas, a psychotic killer returns to torment a happy family.

After her release from the hospital, Christine drives straight to Colorado. The heat in her car is busted and her clothes are thin, but Christine doesn't mind the chill. She is going to find Alex, and when she does, she will have vengeance to keep her warm. Years ago, after giving up her son for adoption, this delicate young beauty flew into a fit of jealous madness, killing her child and his new mother. The boy's adoptive father, Alex, got away. He did not go far enough.

Living in Denver with his new wife and her six-year-old son, Alex is happy for the first time in years. When he learns of Christine's release from the hospital, the police assure him that she won't be allowed to harm his new family. But when strange things start happening around their rambling old house, Alex begins to fear that Christine is closer than he thinks.