In the third year of the Zhenguan era, a transmigrator named Qin Mu shocks the capital of Chang'an with a peerless essay proposing radical reforms, earning the title of Top Graduate. However, his brilliance attracts the envy of the powerful Duke of Zhao, Zhangsun Wuji, who attempts to bribe and threaten him into surrendering his hard-won position. Just as guards move to eliminate this humble commoner, Qin Mu awakens a God-Level Sign-in System.

His first reward merges him with the legendary Sword Immortal Li Bai, granting him unparalleled martial arts. Defying the corrupt nobility, he makes a rebellious choice: instead of staying to fight in the court, he travels to the hostile kingdom of Tubo to begin his sign-in journey. For ten years, he hides in enemy territory, accumulating terrifying power and resources.

Now, the exile returns not as a scholar, but as the commander of a million-strong elite army, ready to shake the foundations of the Great Tang and rewrite history with iron and blood.