ICAC Investigator William Luk and JFIU Chief Inspector Lau Po-keung both hit a dead end in their investigation of a bribery case and a money laundering case. In the meantime, William Luk was suspended when model Eva Ng went to Inspector Kenny Ching of ICAC’s Internal Investigation Group L, to file a report against him for accepting a $12M bribe. Lau discovered Luk was set up and whoever framed Luk was connected to his case. He began to suspect the bank manager Thomson Yau was assisting a gangster, Wong Hoi-wo in money laundering activities. When Director Hong Liang of China’s Anti-Corruption & Bribery Bureau (ACBB) provided Lau with important intelligence, it became clear the money laundering activities were connected to a corrupted Vice-Ministerial Level cadre. To clear his name, William Luk put everything on the line…

1993年，大批中国商人涌入俄罗斯淘金，其中，有几张与众不同的面孔，他们在倒爷中间探听消息，在黑白两道寻求支援。他们是中国警方派出的一个秘密小组，他们此行的目标是暗中查找震惊中外的中俄K3列车大劫案的情报线索，并将全部在逃涉案嫌疑人抓捕归案。在中国警方小组组长陈亚力的带领下，小组克服重重的阻碍，经历了九死一生的磨难，在遥远的异国他乡展开了一场曲折惊险的追缉之旅。

他们是一群比坏家伙们更坏的人，然而就是这样一群人，却用专属于他们自己的手段为社会除暴安良。

Sent into a drunken tailspin when his entire unit is killed by a gang of thrill-seeking punks, disgraced Hong Kong police inspector Wing needs help from his new rookie partner, with a troubled past of his own, to climb out of the bottle and track down the gang and its ruthless leader.

A man looking for the release of a long-time prisoner takes a police officer, his daughter, and a group of strangers hostage.

辽东市公安局为加强队伍建设，成立了以督查部门牵头的“清网办”，集合了刑侦，督查，技侦等各部门的精英分子参与此次行动。主人公冯鸿涛是刑侦支队的支队长。他工作严谨，思维缜密，而且有着过人的侦查能力。在这次“清网行动”中他投放了大量的精力去抓捕“杀手冷”。然而冷宝军却是个极端狡猾的犯罪分子，他不断地从警方的视线中逃脱，同时又不断地在全国各地作案，使侦破工作举步维艰。随着时间的推移，一个又一个的在逃犯被缉拿归案，辽东市“清网办”的战功也在全国排到了前列，就在清网行动接近尾声的时候，冯鸿涛和“清网办”的骨干成员终于凭借他们敏锐的侦查力和判断力发现了冷宝军的踪迹，最终在一所医院里锁定了身穿白大褂，乔装成医生准备逃离现场的“杀手冷”。

中国北方一个大都市的刑警队，面对“凶杀”“绑架”“窃密”“奸情”“贩毒”、“网络犯罪”“谋财”等一个个带有鲜明时代特征的犯罪案件，警探们以丰富的知识，敏锐的目光，缜密的推理，科学的手段和艰苦的调查，一次次准确及时地寻找出犯罪嫌疑人，使案情大白于天下，惩恶扬善，维护社会的秩序和法律的尊严。

该剧以代号803的中国刑警为原型，真实讲述了他们侦破的经典案例，生动塑造了一线刑警的形象。剧中，在现代化飞速发展的时代，雷震霆、司徒敏、武天阔、李心畅等中青年干警侦破一宗宗罪案，打击犯罪，破获经济诈骗，千里缉凶，网上追逃，通过和罪犯的斗智斗勇，除暴安良，维护了百姓安宁， 捍卫了法律尊严。