"If you have to get your hands dirty to protect the light, will you?"
In order to avenge his father, Mu Ci, a genius from the police academy, took the initiative to sneak into the most dangerous drug lord organization "Black Dragon Society" in Ming'an City. Waiting for him are the still-uncold corpses of his fallen brothers, and an undercover mentor who is full of mysteries and as cold as ice—Lin Mo.
Here, blood is poison. In the first lesson, Lin Mo put the gun into his trembling palm: "Mu Ci, come on, shoot, I'll teach you." The bullet penetrated not only the bullseye, but also a policeman's innocent belief in justice. He must learn to survive in the drug den, learn to pass cigarettes, fight, and even... Learn to be indifferent.
However, there are turbulent undercurrents within the Black Dragon Society, and the top police officials are hiding a mole codenamed "The Fisherman." Trust becomes a luxury product and every step is a cliff. When he was forced to raise a knife to innocent people at gunpoint, and when Lin Mo uncovered the bloody past of his deceased wife on a rainy night, Mu Ci truly understood: Some battles begin with putting on the police uniform, but finally take it off - in order to become the shadow itself.
When the final encirclement and suppression comes, the identity is exposed and the gun is fired from behind. In a desperate situation, Lin Mo, who was seriously injured, handed him the bloody evidence and said with anger: "Mu Ci... Come... Shoot... I taught you."
Facing the painful eyes of the man who was also his teacher and father, Mu Ci put his finger on the trigger. This shot is a matter of life and death, and more importantly, a legacy that is heavier than life.
