Interpol Lu Xiao went undercover for three years and became the confidant of drug lord Gui Mian under the name of "Shadow Knife". However, the moment his identity was exposed, he detonated the headquarters and bloodbathed the seven-story underground lair. City Bureau Captain Shen Jin traces this shocking explosion, but he doesn't know that the murderer is the comrade he fired personally. The white crow secretly delivers the key, Lame Qi carries a bloody tattoo, and Chen Yan's silence is pushing the truth deeper into the abyss. When the gun of justice is aimed at the old world, who can tell who is the hunter and who is the trapped beast?
