作为亚洲金融中心的香港被称作“最安全的城市”，国产岂料警局接到一通匿名电话，国产对方声称劫持了警队的一辆前线冲锋车以及车内的五名警员和武器装备。此次事件引起了香港警队高层的高度重视，适逢处长（王敏德 饰）出访国外，此时由鹰派人物行动副处长李文彬（梁家辉 饰）与年轻的管理副处长刘杰辉（郭富城 饰）一起负责这次案件，并将行动命名为“寒战”，李文彬任总指挥。李文彬的儿子（彭于晏 饰）也是人质之一，刘杰辉因此对李文彬父子产生怀疑。与此同时，匪徒展开了进一步行动：警察被杀、爆炸案频发……到底是谁在将整个警队玩弄于鼓掌之中？香港真的是“最安全的城市”吗？
回复 :A woman vanishes. Two men take to the road in search of her: they both love her. Why did she leave? Each one of them has his own suspicions, and hides them from the other one who—mysteriously—never truly becomes his rival. Neither is right—but is anyone? This sudden runaway becomes the hidden core of a number of fictions that the film delicately weaves together: the secret of the heart of another woman, lost as well, many years ago; the secret of the life of a village in the countryside, governed by a supernatural incident that nobody seems to perceive; the secret of the plains, which never ceases to spread and devour everything, like the shadows that invade the world after the twilight hour.
回复 :十年前，郭云飞的父亲因为报道一起CZ12文物走私案件而失踪，郭云飞为了查出事件真相，接替成为新一任网络黑客“金手指”。在调查过程中，牵扯出CZ12和丰润集团的关系。丰润集团为了对抗“金手指”入侵，邀请黑客组织“粉碎者联盟”的山猫进行反击。与此同时，警察沈昊也在暗中调查CZ12的真相。警察和黑客，一个在现实搜索证据，一个在网络入侵搜查丰润，来了一场同为正义却一警一匪的较量。虽然在整个过程中沈昊与郭云飞亦敌亦友，却共同揭开了罪犯的丑恶面目。
回复 :The film is based on multiple true incidents that took place in the states of Andhra Pradesh and Telangana.
