In the twenty-eighth year of Kaiyuan, young swordsman Li Changan was ordered by his master to go down the mountain. At the Qujiang Spring Banquet, he drew his sword to protect Shen Qingshuang, a school musician who was molested by a powerful man. Since then, he has been involved in an unfathomable political whirlpool. Shen Qingshuang's true identity is the granddaughter of the famous Prime Minister Zhang Jiuling, and she holds evidence related to the safety of the Tang Dynasty. With the secret assistance of Pei Shishi, the general of the Jinwu Guard, and through clues such as the old drug store and the West Market Jewelry Store, the two gradually uncovered the shocking conspiracy of the right prime minister Li Linfu colluding with the side general An Lushan to secretly exchange military supplies and post routes with the intention of overthrowing the East Palace.
