Three years ago, undercover police officer Lu Zheng was accidentally exposed at the gate and disappeared from the world. He was judged by the police force to have "died in the line of duty." Only Shen Mu didn't believe it. With his talent in psychology, he pursued the case all the way, and finally three years later, he personally captured Lu Zheng, who had become the second-in-command of the criminal group.
However, Lu Zheng put forward an incredible condition: he would only cooperate with the police, but he had to go through Shen Mu in the process. As a result, Shen Mu, the psychological profiler who knows the criminals best, was forced to form the most dangerous alliance with Lu Zheng, the stranger he was most familiar with.
They joined forces and used incredible means to dismantle one criminal network after another from the inside. Lu Zheng walks on the edge of right and wrong, uses ruthless methods, and believes in fighting violence with violence; Shen Mu, within the framework of law and justice, tries to control the overall situation with psychological games, and must always be wary of Lu Zheng losing control.
But in every life-and-death mission, the buried past emerges: Lu Zheng's "defection" seems to have a hidden agenda, and Shen Mu's life experience is inextricably linked to the ultimate criminal group they are tracking. Trust and suspicion, use and protection, killing and redemption... The two danced together on the tip of the knife, and their emotions heated up to the extreme in the constant tug.
Until the end, all the clues pointed to a shocking conspiracy that could shake the entire city, and the key to unlocking it was hidden in Lu Zheng's three years of hellish experience and Shen Mu's dusty memory.
Purpose: "The police officer who should bring him to justice became the only condition he was willing to open his mouth to, and he asked him to supervise him day and night - just to personally uncover the truth behind the 'death' three years ago that dragged both of them into hell."