The daughter of an imperial physician, Wen Guiyi, rescued Xiao Yunjin, the crown prince of Prince Ning, who was seriously injured on a snowy night. However, she found golden silk from the Western Regions in his wound that was the same as her father's medicine box. A concubine in the palace suddenly fell ill, the emperor went crazy, his father was falsely accused of poisoning, and Gui Fen was forced to flee. As the investigation deepened, she discovered that the prince's rebellion fifteen years ago was actually related to a strange fragrance called "Zhenxiahuan". Her father, Xiao Yunjin, and even the young caravan leader Xie Qingwu, who was disguised as a man, were all entangled in this conspiracy. When the truth comes like an avalanche, Gui Yi must use a silver hairpin in the Jinluan Palace to uncover the shocking secret that can overthrow the dynasty...
