In this corner of the city where crime thrives, Lu Zhiyuan, a special consultant of the Criminal Investigation Detachment, dissects the dark side of human nature with extraordinary insight. This lonely and cold psychologist builds high walls with reason, and only shows his strength at crime scenes.
Captain Chen Feng was once full of doubts about this "scholar" who only understood theory, until a series of unsolved cases came to light through Lu Zhiyuan's unraveling. Activists and theorists form a perfect partnership, working hand in hand on the border between crime and punishment.
In the shadows, entrepreneur Mo Yan is setting up a dangerous intellectual game. This highly intelligent killer who hides his face with charity calls himself an underground judge and regards Lu Zhiyuan as his only opponent. When twisted justice meets the bottom line, the city becomes a chessboard for the game between the two.
Lies and truth are intertwined, reason and emotion collide. Lu Zhiyuan must face his inner trauma while solving the case, and keep the bottom line of law and morality in this duel about life, death and faith.
