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The story begins with the protagonist Xuan Shengji commanding the songye mountain mission. In the face of the enemy's cunning and traps, our public security and special police were badly hit. Wang Xiaoyang, the woman squadron leader of special police, died to protect Xuan Shengji, and she is also the newly married wife of Nan Feilong, Xuan Shengji's best comrade in arms. Subsequently, xuanshengji's fiancee Liu Chen was seriously injured in a planned car accident and was hospitalized. Xuanshengji was strongly hit. At this time, he did not know that there was a huge conspiracy between the songyeling case and the planned car accident, and all this was closely related to the 107 major gun battle case 20 years ago and the disappearance of xuanming, xuanshengji's father.

Xuan Shengji led the special case team of the Criminal Investigation Detachment to solve the case. After trying to solve all difficulties, he was surprised to find that several bizarre and malignant cases in recent years were more or less related to the 718 old case 30 years ago and the 107 case 20 years ago. Whenever the special case team mastered new clues, it would always encounter various obstacles, even in the face of witness accidents and all kinds of desperate situations. In the face of complicated cases, Xuan Shengji finally pointed the suspect to his mentor and Tang Wu, the only survivor in the 107 case.

traitor? Insider? Undercover? be missing? Mystery man

LAN Linlin and Fang Zhi, members of the special case team led by Xuan Shengji, are the older generation of criminal policemen. They have also worked with or died in the 718 and 107 cases. In the face of powerful opponents, they repeatedly took risks and ran into a wall, and finally locked the surprised suspects. However, they could not accept such a result. Xuan Shengji didn't know how to face all this. Where would they go in front of justice and law?