出差途中沉迷性爱，结果无法返程

　　尼科的梦想要实现了！他和他的父亲可以成为圣诞老人驯鹿队的一员。然后突然斯特拉出现了，想要占有他的位置。虽然他们都在争夺这个位置，但他们也成了朋友。但是，圣诞节前一天，雪橇被偷了！圣诞节有被取消的危险，只有尼科能救它。

　　来自21世纪的项少龙（古天乐 饰）曾意外穿越，并助秦王（林峯 饰）一统天下，这段跨越时空的宿命纠缠将两人紧紧捆绑，两人也成为亦师亦友的情感羁绊。然而，在项少龙归隐田园多年后，未知穿越者却骤然降临，大国基业陷入倾覆危机，秦王不得不求助于早已不问世事的项少龙。面对足以颠覆历史的强敌，他们能否放下芥蒂联手抗敌？那段掺杂着师徒之恩、君臣之畏与知遇之情的情感，又将成为保护彼此的铠甲，还是刺向对方的利刃？                        

Four friends wanted to get away from it all for a birthday celebration in a remote country house, but when a mysterious injured man turns up on their doorstep telling tales of a city ravaged by a mysterious epidemic and the looters who have pursued him, the friends rally to help. As the night progresses, it becomes clear that all is not as it seems, plunging the friends into a battle for survival that challenges their deepest fears.