Shrouded in the shadow of crime, the city was dragged into the abyss of panic by a series of bizarre cases. Qin Chi, a leader in the police world, is known for his rigorous logic and cool mind; Pei Shu, a forensic doctor, has superb technology and strong insight.
The two people, who had nothing to do with each other, were forced to join forces because of an extremely difficult case with a mess of clues. They shuttle between the dark corners of the city and its bright appearance. Every tiny clue is like a puzzle piece, and as they peel off the cocoons, they gradually piece together the astonishing truth.
However, as the investigation deepens, the forces hidden behind them begin to surface, trying to prevent them from accessing the core secrets. Can they rely on each other's tacit understanding and wisdom to complete this "puzzle of the truth about the shadow of crime" in the fog, and restore peace to the city? Everything will gradually become clear in the battle between life and death and justice...