The Thomas family goes out to their cabin in the woods to celebrate Christimas together with their daughter and her boyfriend, but their first Christmas together may be their last.

Meeting his girlfriend's family for the first time, Ryan must prove his intentions with their daughter, Sarah, and win the approval of her father, Greg. All the while masking his jealousy for Sarah's ex-fling, Tyler. As the Christmas celebrations and traditions begin, things start to happen around the cabin. As a blizzard descends on Lake Alice, so does evil. The family members are hunted down one by one and struggle to stay alive as their power in numbers slowly dwindles.