During the Qianlong period of the Qing Dynasty, internal and external troubles intertwined. Above the court, party struggles are fierce; among the people, people are running for their livelihoods. The Wang family of Yangzhou salt merchants was destroyed due to a smuggling case. The orphan Wang Xin'er was forced to get involved in the disputes between the powerful in the capital in order to survive. Su Jiajie, a man with a yellow flag in Manchuria, is an imperial guard but has the ambition to serve his country. In the turbulent current situation, he meets Wang Xin'er and gets to know each other, and together they uncover the shocking conspiracy hidden in the prosperous age.
