在这部沉默的证人动作/犯罪片中,雨夜，香港法医中心遭遇一伙训练有素的悍匪的洗劫。来者挟持陈嘉豪（张家辉 饰）乔琳（杨紫 饰）两位法医，逼迫他们寻找一具特殊尸体并找出尸体体内的一颗子弹。法医在解剖的过程中发现，子弹事关一场黑帮血拼的大案，而匪首SANTA（任贤齐 饰）的身份也另有蹊跷。为了保护证物揭开真相，手无寸铁的陈嘉豪乔琳，利用身边一切可以利用的器械，和法医中心的特殊地势进行布局反击。逐渐被激怒的匪徒越发狂躁嗜血，陷入绝境的法医们，无畏楼毁人亡的危机，决心硬刚到底！
A cat-and-mouse game unfolds over a single night when three armed criminals barge into a morgue, demanding the forensic doctor and his assistant to hand over a bullet lodged inside a corpse. While the criminals are in a desperate attempt to hide their true identities, the doctor finds himself sinking deeper and deeper into a quagmire as his past inadvertently catches up with him. Each explosive twist soon pushes the characters beyond their limits.
两个字，bug多。（全都是剧透）。没人能在停尸房赢得过我！。一场干净利落的猫鼠游戏。渣渣灰你不要这么赶片，好不啦？。难得打个二星，我一定要墨迹一下！。猎杀之夜。杨紫这样的，还想当花瓶？。这个平安夜，注定会成为他们永难忘记的噩梦。总的来说，其实不错，暑期档平均水平的合格之作。韩国第一美女克拉拉全程演尸体，这剧组太任性！。
