During the Republic of China, Shanghai fell, and the Japanese burned, killed, looted, and committed all kinds of evil on this land. Wang Zhongcheng was originally a small businessman. Seeing his compatriots suffering, his heart was full of resentment but helpless. Xu Yiyong is a dock worker who is generous and righteous. He often conflicts with the Japanese and traitors who bully the people.
Once, Japanese soldiers raped civilian girls on the street. Wang Zhongcheng couldn't stand it anymore and came to help, but he was outnumbered and fell into trouble. At this time, Xu Yiyong passed by. He roared, picked up the wooden stick next to him and rushed forward. He and Wang Zhongcheng fought off the Japanese soldiers side by side. The two met unexpectedly. During the conversation, they found that each other was a loyal and patriotic person, and they cherished each other.
Seeing the increasingly rampant atrocities committed by the Japanese army, Wang Zhongcheng and Xu Yiyong decided to do something. They established the Loyalty Society and spread anti-Japanese ideas everywhere, attracting people with the same loyalty to join. At first, the members of the association were just some poor people and small vendors. Later, as the Zhongyi Association rescued compatriots who were persecuted by the Japanese army time and time again, its reputation gradually spread, and more and more people from different walks of life joined it. From the upper class people in Shanghai to the "lower-class" people in the world, the scale of the Zhongyi Association continued to grow.