In 1930, there was a turbulent undercurrent on the beach in Shanghai. Patrolling Zhongqiu seems to be mediocre and greedy for profit, living in a hazy way. No one knows that he hides another side. A mysterious ring, a hidden small building, he wandered between light and darkness, cigarette dealers, spies, and villains died unexpectedly one after another. Who can see through this carefully woven murder mystery?
