由好莱坞一线动作导演雷尼·哈林执导的警匪犯罪动作片。三名手持武器的狂躁匪徒在平安夜杀入香港法医中心抢夺证物，枪杀了楼中保安，并挟持和暴虐对待两位法医。在此期间，法医对匪徒身份起了怀疑，而他们真正目的似乎另有隐情。法医偷换证物并利用对环境的了解和身边专业器材如柳叶刀、化学试剂等等进行拼死反抗，最终和被逼入末路的匪徒展开近身肉搏，面对法医中心即将楼毁人亡的情景，双方同归于尽还是一方侥幸逃脱还未可知…

　　一次意外使得干探于子朗（郭晋安 饰）具有了通灵的能力，能感应死去的冤魂传递给他的点点滴滴的信息。子朗本来就精明能干，这下更是如虎添翼，屡破奇案。才华出众的他却受到了上司的嫉妒，于是接口特别凶案调查组的上司准备退休，到那里很快就能升职将他调到了那个警局神憎鬼厌的部门，D.I.E.。与此同时，Madam 刑（郭羡妮 饰）因为过于想表现自己而屡屡闯祸，结果遭到多方投诉而被上司打发到了D.I.E.。Madam 刑和子朗来到这里都发现这里的人十分奇尼古怪，由于两人都一心想着接替即将提休的上司的位置，于是两人结成了冤家，展开了一番明争暗斗。幸好随后两人握手言和，子朗更是暗恋上了Madam 刑，两人一起携手为那些沉冤代雪的冤案伸张正义。

Wrongly imprisoned after Hong Siu-lung’s time-traveling disappearance, Ken was wrongly imprisoned and lost everything. After his release, he leads his daughter Galie and a team to steal the Cme machine. Equipped with a face-duplication device, Ken plans to pose as the Qin Emperor and realize his dream of being king as his way of making up for everything he lost. Meanwhile, in the Qin Dynasty, Hong Siu-lung has been living in seclusion in the countryside with his wives Kam Ching and Ting-fong, his son Bowie, and his blood brother. Life looks peaceful on the surface, but the family are closely watched by the Qin Emperor. Ken launches an ambush on the Qin Emperor, but the emperor manages to escape. Meanwhile, Hong knows that as the only person who knows that the Qin Emperor is actually impersonated his disciple, he will be worthless once the Qin unites the warring states. To protect his family, Hong decides to uproot his family.

Wrongly imprisoned after Hong Siu-lung’s time-traveling disappearance, Ken was wrongly imprisoned and lost everything. After his release, he leads his daughter Galie and a team to steal the Cme machine. Equipped with a face-duplication device, Ken plans to pose as the Qin Emperor and realize his dream of being king as his way of making up for everything he lost. Meanwhile, in the Qin Dynasty, Hong Siu-lung has been living in seclusion in the countryside with his wives Kam Ching and Ting-fong, his son Bowie, and his blood brother. Life looks peaceful on the surface, but the family are closely watched by the Qin Emperor. Ken launches an ambush on the Qin Emperor, but the emperor manages to escape. Meanwhile, Hong knows that as the only person who knows that the Qin Emperor is actually impersonated his disciple, he will be worthless once the Qin unites the warring states. To protect his family, Hong decides to uproot his family.