Two detectives are called to a small mining town in the Asturian mountains where a young woman who had been left for dead for months has suddenly appeared, leaving the detectives to question what dark forces are at work....
又是一年圣诞节，伴随着欢快温暖的圣诞歌曲，人们疯狂涌入超市抢购圣诞节猎物，为此不惜大打出手，仪态尽失。经过一轮混战，汤姆（亚当·斯科特 Adam Scott 饰）和莎拉（托妮·科莱特 Toni Collette 饰）这对夫妇扛着大包小包，历经艰苦，总算带着麻烦不断的一双儿女贝丝（Stefania LaVie Owen 饰）和麦克斯（恩杰伊·安东尼 Emjay Anthony 饰）回到家中。晚餐时间，性格各异的亲戚们准时到来，让这个家里热闹的同时也给主人们带来不小的烦恼。小麦克斯刚刚和人打过一架，因为别的孩子说圣诞老人子虚乌有，饭桌上亲戚家的孩子挑衅的说法更令他怒火中烧。当晚，诡异的冰血暴袭来，神秘的怪物突降人间，仿佛要给不相信圣诞老人存在的愚蠢人类以严厉的惩罚……...
