The protagonist Qin Chuan's hometown is in Shaanxi. Due to a flood, all the houses were washed away, so he had no choice but to run away. He heard that Zhu Di was recruiting people to build the Great Wall, so he came to work in Peking. When he got off work that day, he saw three gangsters in the street. He robbed an old man, so he rescued him. Unexpectedly, the rescuer was Zhu Yuanzhang. It turned out that Zhu Yuanzhang wanted to pass the emperor to his grandson Zhu Yunwen, and was worried that Zhu Di, who was stationed in Peiping, would rebel, so he paid a private visit here incognito.
