反(🌠)黑组警长肥沙(林雪 饰(shì )),不(bú )(🌰)慎(shèn )丢失手枪(qiāng )。这件事非同(tóng )小(xiǎo )可,如(🎹)果手枪被(🛤)匪(🌰)徒用去行凶(xiōng ),肥(💤)沙(😧)将大祸(🌫)临头。PTU((🏇)警(jǐng )察(chá )机动部队(duì ))(🐿)警官何文展(🤷)(任达华 饰)(🙍)出于(yú )义气(qì ),答应一(🚥)定会在(zài )天亮(liàng )之(zhī )前(🥞)寻(🗑)回手枪(qiāng ),带(dài )几(jǐ )名(🖍)手下开(🥀)展了寻枪行(háng )动。另一方面,却在横(héng )生枝节:警员(yuán )Kat(邵(shào )美(měi )(🌑)琪 饰)死守纪(jì )律(🙂),坚持要将此事(🤠)汇报上(🙄)级处理;而(ér )在同(tóng )一晚,CID的Madam张(zhāng )((😍)黄卓玲 饰)在接手一单黑(🧣)社会谋杀案时,怀疑肥沙与黑社会有染(rǎn ),由此与PTU发(fā )生(shēng )意见分歧。人(rén )与人(🌪),部(🌼)门与部门之间的矛(máo )盾、争(zhēng )斗和角(🤔)力,在夜(🤥)幕(⏲)中(📛)徐徐拉开。而(ér )第二天清早(🐞),揭晓的真相,原来都(🌱)在他们的意(yì )(🔫)料之外(wài )(🚡)…(🌸)…