Xu Guozhu went to visit the injured Dong Hu and inquired about the Qiangzi who helped people smuggle out of the dock.But Dong Hu stuck to his “rules” and was unwilling to reveal any information to Xu Guozhu.Xu Guozhu moved him with emotion and reason, and Dong Hu was slightly moved.Xu Guozhu led several police officers to hide on the boat, preparing to arrest Song Xiaogang, who wanted to sneak into the country and escape. Unexpectedly, someone beat him to it and he was not caught.It turned out that Song Xiaogang was picked up by someone sent by Xiaoqing.In order to prevent Song Xiaogang from revealing herself, Xiaoqing decided to kill someone and pretend to commit suicide in a car accident.But accidentally when the car exploded, it hit the remote-controlled drone recording everything in the sky, leaving clues.Xiao Lu and Xu Guozhu were out in the field and were extremely uncomfortable seeing corpses. Cui Tiejun set a test for Xiao Lu in order to train him. He told Team Tian about the drone fragments Xu Guozhu found at the scene and suspected that there was something behind the scenes.It was the same person who killed Lao Xia.