This drama is adapted from the ancient romance novel of the same name by You Sijie. It mainly tells the story between Xiao Duo, the eunuch who holds the seal of power and the talented Buyinlou who was supposed to be buried with the emperor. During the Longhua period, Xiao Duo, the eunuch who holds the seal of power and the emperor, planned a palace coup with King Fu to help him ascend the throne. Buyinlou, the talented person who was supposed to be buried with the emperor, was rescued by Xiao Duo because of the emperor's favor. Later, he was placed in Xiao's mansion. The two spent day and night together and gradually fell in love, but because of their status, they had to hide their feelings. Xiao Duo went to the south of the Yangtze River to supervise the silk trade with foreign countries. Yinlou followed him to visit relatives in the south. During this period, the two fell in love and finally revealed their feelings. However, there were many obstacles ahead. Xiao Duo's true identity, the threat of King Nanyuan, and the suppression of the emperor in the palace, a mistake would lead to a fatal disaster. Yinlou sacrificed herself for the overall situation and decided to enter the palace. Xiao Duo, who didn't know the truth, misunderstood her. The people who originally loved each other endured lovesickness and were overwhelmed... What is the fate of the two?