In the early years of Kaiyuan, the prince {Li Longji} had great ambitions, but was repeatedly hampered by Princess Taiping, making his road to imperial power difficult. The daughter of a Liyuan family, {Li Leyao}, was selected into the East Palace Liyuan with her unique skills on the pipa and the prototype of "Nancy Clothes and Feather Clothes". The two became acquainted with each other because of music, and they often held candles and talked at night, and their love secretly arose. Le Yao has a keen insight into Princess Taiping's murderous intention to seize power, and secretly warns Longi many times to help Longi resolve the life-and-death crisis; Longi uses Leyao's contacts in the theater to set up an intelligence network and prepares intensively for a counterattack. In the first year of Xiantian, Longji launched a coup to eliminate Princess Taiping's power and ascended the throne as emperor.