The Three Old Boys went to Shanzhou and once again joined forces with Captain Mao, whom they had met in the past, to plan the arrest of Tang Axiang. Unexpectedly, they were discovered halfway. The Three Old Boys regained the tacit understanding of the past, intercepted and fought against Tang Axiang.After unremitting efforts, Tang Axiang was finally successfully arrested and brought to justice, and won the respect of his colleagues in Shanzhou.During the interrogation, Tang Axiang said that he was set up by a person named Xiaoqing. Cui Tiejun and the other three felt that there was something fishy and decided to dig deeper.Through the police call, it was suspected that when Lao Xia was murdered, a drug trafficking transaction was taking place in another abandoned factory not far from the scene of Lao Xia's murder.The three people went to the abandoned factory to investigate and found that a drone was following them, but they did not stop the person who controlled the drone.Cui Tiejun recalled that the video in the drone's memory card that he had found earlier was the content of Lao Xia's murder shot from the sky, and knew that someone stood by and watched Lao Xia's murder, and this person was probably the person named Xiao Qing in Tang Axiang's mouth.people.