While meeting his girlfriend Sarah's family for the first time, Ryan Emerson must prove his intentions and win the approval of her father, Gregg, while he masks jealousy for Sarah's ex-fling Tyler, As the Thomas family settles in, things start to happen around the cabin: strange footprints by the window, noises from outside, and a bittler animosity from the the locals, including law enforcement. As a blizzard descends on Lake Alice, so does the evil from behind the camera, as the Thomas family is hunted down one by one. The family struggles to stay alive as their numbers slowly dwindle.