In the 1990s, when criminal policeman Zhou De of Lushan City, a small town, was arresting drug dealer Rong Chengyi, Rong Chengyi died in an accident. Zhou De was punished for this, and he thought the case would come to an end. Unexpectedly, Zhou De's wife Wang Tingfang was retaliated and died. Zhou De waited for four years to find out the murderer. Finally, he learned that the person who killed his wife was Rong Chengyi's brother Rong Chengzhi. He had now fled to Ruan Nan Kingdom and made a living selling jewelry. So Zhou De and new police officer Chen Yijie went to Ruan Nanguo to arrest Rong Chengyi even if they embarked on a road of no return.
