Xu Chengze, captain of the Linzhou Criminal Investigation Detachment, is an "iron-faced judge" who makes criminals fearful with his decisiveness in killing. Mu Yunhe, a doctor of criminal psychology portraits, is cold and meticulous, and is a "mind reader" who has insight into people's hearts.
A bizarre serial imitation case forcibly binds people from these two worlds. They have different ideas and are at odds with each other, but in the desperate battles, they become each other's only weakness.
With all members of the police force assembled, serious crimes occur frequently, including drug industry chains, rich family conspiracies, and old cases from thirty years ago. Facing the "ghosts" hiding in the dark and the huge power network, Mu Yunhe used his heart as a blade and Xu Chengze used his body as a shield.
This is a game about justice and redemption, and also a deep affection from tit-for-tat to life-and-death trust. Let's see how the two strongest partners work side by side to break through the fog of the long night and give light to this city in the name of faith.
Mission: In the name of faith, give light to the city