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.

瑞恩第一次拜见未来的岳父岳母，而一场暴风雪即将降临爱丽丝湖，邪恶也随之而来。他们的家庭成员一个个被神秘人击倒，必须逃命，因为他们的力量在逐渐减少。问题是，神秘人不止一个。 第一次和女友的家人见面，赖安必须向女儿莎拉证明他的意图，并得到她父亲格雷戈的赞同。一直在掩饰他对莎拉的前男友泰勒的嫉妒。随着圣诞节的庆祝和传统的开始，机舱周围开始发生事情。当暴风雪降临在爱丽丝湖上时，邪恶也随之降临。家庭成员被猎杀一努力活着的数字力量慢慢缩小。