An operation to encircle and suppress gun dealers ended in just seven minutes. Several gangsters were shot dead and the leader Xu Zhihai was captured alive. The task was completed neatly, but Li Jian, director of the Linhe City Public Security Bureau, was worried. Major gun-related cases occurred one after another on the border. If they were not rectified, there would be endless troubles. According to Li Jian's instructions, Zhang Meng, an investigator of the Linhe City Public Security Bureau, sneaked into the prison as a prisoner, ready to dig clues from the criminal Xu Zhihai. After several efforts, Zhang Meng successfully won the trust of Xu Zhihai, but Xu Zhihai kept his mouth shut about the gun. By chance, Xu Zhihai robbed a garbage truck to escape from prison, and Zhang Meng followed Xu Zhihai on the garbage truck without hesitation. On the way to escape, Xu Zhihai was shot dead by public security officers. Before his death, he asked Zhang Meng to go to Lavesk, Russia to find his brother Xu Zhiqiang.