With the police unable to arrive in time due to a snow storm, Kelli, Melissa and Leigh decide to stay inside the house whilst Heather and Mrs. Mac flee. In the car, Heather is murdered, and Mrs. Mac is impaled by a falling icicle. While Kelli and Leigh descend to the garage to investigate, Melissa is attacked and killed by the assailant. Kelli and Leigh return upstairs and find Lauren's eyeless corpse. Kyle returns to the house, and the three go to investigate the attic; while ascending the ladder, Kyle is dragged into the attic to his death by the assailant, who is revealed to be Agnes, now an adult. As Billy enters the attic, Kelli and Agnes struggle, leading the two of them into the empty space between the walls of the house. As the killers converge toward Kelli, Leigh helps her escape before they start a fire, leaving Billy and Agnes to burn to death.