Gu Nanzhi, an heir to the legendary Medicine King Valley, descends the mountain to find her family. At a train station, she saves Gu Shouren, the owner of Shouren Hall, who has been suffering from chronic poisoning. Recognizing each other as father and daughter through matching halves of a fish-shaped jade pendant, they join forces. Gu Nanzhi deliberately disguises herself as a rustic country girl to help expose the conspiracy between her stepmother, Sun Jinxiu, and the shopkeeper, Zheng Wenyuan. With every move carefully planned, she exposes the fake heiress, gathers evidence of their crimes, and foils their plot to seize the century-old business and its overseas trust. She resolves Shouren Hall's trillion-yuan crisis, overcomes her enemies' provocations, demonstrates the extraordinary medical skills of Medicine King Valley, and eliminates internal threats. Eventually, she takes over Shouren Hall, reorganizes it into the Medicine King Group, and leads traditional Chinese medicine onto the international stage.