Sima Qian, a doctor of modern history, was obsessed with studying the tragedy of the Han general Li Guang who was not granted a title. He suffered a cerebral hemorrhage and traveled to the fictional historical dynasty "Da Wu Dynasty". He accidentally possessed Sima Qian, the deputy general of the famous Wu Dynasty general Li Guang. Faced with the same military dilemma as Li Guang of the Han Dynasty, he was determined to use modern military knowledge to reverse the situation of the war.
In the Battle of Yanmen Pass, Sima Qian used "mobile defense" tactics to resolve the lightning raid of the Xiongnu Chanyu, but he missed the opportunity to become a marquis due to the constraints of the great Sima Wei Qing. As the battle of the Hexi Corridor unfolds, he discovers that the imperial court hides the thousand-year curse that "flying generals must be defeated" - General Huo Bing has actually formed a mirror image relationship with Wei Qing and Huo Qubing during the reign of Emperor Wu of the Han Dynasty. In order to solve the dilemma, Sima Qian teamed up with Li Guang's daughter Li Dai to improve the Han bow craftsmanship, and was accidentally involved in the "substitution plan" of the fourth princess Liu Jing, starting a battle of wits between military secrets and rouge powder.
When Sima Qian discovers that Emperor Liu Zhi is actually the reincarnation of Emperor Wu of the Han Dynasty, and that the Xiongnu caodu is actually a descendant of Huo Qubing, this war that spans time and space will finally reveal the ultimate mystery of historical reincarnation.
