After his grandfather unexpectedly dies in the night, 12-year-old Henry finds himself cut off and alone on an isolated farm. When his nearest neighbor, Dixon, realizes that the boy has no one to protect him, Henry becomes a target for reasons he cannot understand. With his parents at least 24 hours from returning and a massive snowstorm brewing Henry retreats into the house and prepares for a siege. What follows is a desperate battle for survival that will also unlock the terrifying connection between his family and the killer next door.