一个连环杀手连续13个冬天在圣诞节前夕行凶，马上就要圣诞节了，调查人员与时间赛跑，争分夺秒想要弄清楚这位圣诞杀手的下一个目标是什么。

　　Christian - a millionaire heir, meets Sigrid - a young student, on a dating app. They hit it off quickly, but there's only one problem: Christian lives with Frank, a man who dresses up and constantly acts like a dog.