As night approaches, a major blizzard has cut off road access to Meg Harris's isolated wilderness home, Three Deer Point. Meg is alone with her young friend Adjidamo, preparing for Christmas, when a knock suddenly echoes through the house. She finds two strange men at her front door, one of them bleeding. Against her better judgment, she lets them in. At that moment, the power goes out, plunging the group into total darkness and severing all phone links to the outside world. So begins a terrifying twenty-four hours that has Meg summoning up a courage she didn't know she had to get herself and Adjidamo out alive.