When Hong Kong is rocked by multiple gruesome murders, the police forms a task force to investigate. Jun (Sean Lau), once a brilliant detective who suffered a mental breakdown, begins his own investigation. Eventually, the police learn that the murder victims are all suspects of cold cases being rubbed out by a figure known as \"The Sleuth\". Now, Jun and a detective from the task force are on a race against time to beat the brutal killer at its own game. 成于编剧，毁于导演。房间里的怪物，你看见了吗？。终极大boss并不是大家认为的那样？（涉及剧透）。换暴烈的时代语言重写癫狂。真的没人觉得阿Sa和刘青云是一个人么。小人物的突围之路，唯有执着。从“神探”到人探。《神探大战》，造“爽”的教科书。创作者端出一份精致又美味的盛宴，但你首先得喜欢吃，然后才能探讨一下为什么好吃。气质一致，表里一体。 连环命案、私刑执法、预告杀人、以暴制暴...一群号称“神探”的团伙掀起了一场香港有史以来最邪恶的犯罪！患有精神疾病的“癫佬神探”李俊（刘青云 饰）为查真凶独闯犯罪现场！以“神探夫妇”陈仪（蔡卓妍 饰）和方礼信（林峯 饰）为首的重案组也开启了与杀戮赛跑的缉凶之路！敌友之间，正邪边缘，死亡审判的真相究竟是什么？真正的“神探”到底是谁？
