这部剧讲述了滨城刑侦支队众人恪尽职守，各施所常，利用刑侦的测谎技术在短时间查获了一系列刑事案件，并引出了12年前未结的悬案进行了侦查的故事

在12年前的滨城市，有几桩杀人案件轰动了全市所有的受害者，都是社会底层人民，尸体全部在荒废并偏僻的地方被发现，从尸检和现场情况来看，作案手法十分相似，凶手有可能是同一人，而且凶手十分狡猾，与被害人并不相识，导致案件进行并不顺利，警方不懈的调查取证确认了主要嫌疑，凌斌凭借着自己的直觉怀疑起了经常驾驶着绿色吉普车的薛涛，与女儿在一次会面之时对其进行捉捕，最终因公殉职，在12年之后凌斌的女儿成为了刑警一员。

凌然先进的测谎技术帮助支队先后破了几个疑难案件，而刑警支队的组长与凌然搭档，两个人在破案方面有着截然不同的认知，但也有着默契配合的能力，一起合作了许多案子。

This drama tells the story of everyone in the criminal investigation detachment of Bincheng who fulfilled their duties and did their best. case, and led to the story of the unsolved unsolved case 12 years ago

In Bincheng City 12 years ago, there were several murder cases that caused a sensation in the whole city. All the victims were people at the bottom of society. All the corpses were found in deserted and remote places. Judging from the autopsy and the situation at the scene, the modus operandi was very similar. The murderer may be the same person, and the murderer was very cunning and did not know the victim. As a result, the case did not go smoothly. The police Unremitting investigation and evidence collection confirmed the main suspect. Ling Bin relied on his intuition to suspect Xue Tao, who often drove a green jeep, and arrested him during a meeting with his daughter. In the end, he died in the line of duty. Ling Bin died 12 years later. Bin's daughter became a member of the criminal police.

Ling Ran's advanced polygraph technology helped the detachment solve several difficult cases, and the team leader of the criminal police detachment partnered with Ling Ran , The two people have completely different cognitions in solving cases, but they also have the ability to cooperate tacitly, and have cooperated in many cases together.