Due to government shuffle during the reign of Wu Zetian, the ambitious Di Renjie was relegated to a remote town in the east. Di showed extraordinary talent in case-solving, but as he probed further, more and more secrets were revealed. He embarked on a nationwide journey and solved many mysterious cases. In the end, he returned to Chang'an and reunited with his father. Together, they tackled a crisis that threatened peace and order.
Based on Mo Shu Bai's novel of the same name, the story follows Liu Yuru, the daughter of a cloth merchant who suffered from a young age. She is married off to notorious playboy Gu Jiusi, who looks down on her. However, Liu Yuru decides to learn business from Gu's mother and becomes adept at it. She changes her view of Gu Jiusi and discovers his pure and sincere side. Meanwhile, the commander of Yangzhou causes chaos, forcing Gu's family to flee. Gu Jiusi matures and becomes the Minister of Revenue, working to lighten the tax burden on the people. Liu Yuru establishes a women's charity and builds business relationships to bring prosperity to the people. Together, they create a prosperous era.