During the Zhenyuan period of Emperor Dezong of the Tang Dynasty, the afterglow of the prosperous Tang Dynasty gradually dimmed, and internal and external troubles continued. Wars were still raging in the northern frontier, but the imperial court was immersed in extravagance and power struggles. An unknown scholar, Li Mu, bears the hatred of his family and country and the secrets of life and death, and steps into the whirlpool of Chang'an alone. He was originally a secret agent in Liangzhou, and was ordered to expose the conspiracy of powerful ministers collaborating with the enemy. However, while lurking, he was accidentally involved in an even more shocking secret war - the secret forces in the DPRK and China were trying to use the turmoil to tear apart the foundation of the Tang Empire.
In the intricate political game, Li Mu was in danger again and again, dealing with ruthless spies, scheming eunuchs, and complex and unpredictable powerful officials. He is both a chess piece and a chess player, and every step he takes is on the edge of life and death. His justice and loyalty are constantly being questioned, and the light and darkness of human nature are intertwined in the bloody storm.
When the war breaks out in Chang'an, Li Mu must face the final choice: follow his ideals and protect the Tang Dynasty, or sacrifice everything for spiritual freedom? Strategy, faith, family affection, and love are intertwined into a magnificent historical picture, and a story about faith and betrayal, persistence and destruction unfolds.
