The detective worked undercover for five years and was reviled by the whole city as a traitor. Even his former comrades regarded him as a cancer. When the police surrounded him on the street, Shen Xiao tore open his clothes and showed the black secret service card that even the director had no authority to access. And Zhou Yan, the captain who personally signed the wanted order, saw the erased truth in the file for the first time. Gray Crow's neural network is quietly infiltrating the police community, and Su Ling's cell phone contains the last distress signal from Shen Xiao's daughter. This is not an arrest, but a reckoning that has been buried for five years.