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.