A modern special forces soldier transmigrates into Xue Guan, son-in-law to Princess Chengyang in the Zhenguan era: a pawn destined by the history books to be exiled to Fangzhou over a witchcraft case and die in misery.
Other people transmigrate as princes and nobles. I transmigrate as a doomed son-in-law.
The previous son-in-law, Du He, has just been beheaded for treason, and the entire court is betting on how many days I will survive.
Li Shimin has me bound aboard the imperial ship as a hostage, while remnants of the former crown prince's faction try to make me accept a forged document accusing me of "treason."
I laugh. Framing the emperor's son-in-law is the same as framing the Son of Heaven.
Armed with sheer ruthlessness and modern military knowledge, Xue Guan fights his way forward in Li Shimin's realm: he exposes forged evidence and delivers a face-slapping rebuke in open court, then turns from a disgraced son-in-law into the "God of War, Imperial Son-in-Law" through military merit. He defeats the Xueyantuo, conquers Ansi City, and leaves a million corpses in his wake. In matters of love, Princess Chengyang goes from wary to devoted, while the wandering heroine Shen Qingshuang and the Turkic noblewoman Ashina Yun are drawn into his life one after another. His fate is written in peach blossoms.
He knows the history of the next twenty years: when Wei Zheng will die, when Li Chengqian will be deposed, when Goguryeo will be invaded, and when Wu Zetian will enter the palace. Every time he uses his "foreknowledge," he does so with heart-stopping care, because the Son of Heaven's suspicion is deadlier than any enemy.
He intends to rewrite not only his own doomed fate, but also the destiny of the Great Tang in the Zhenguan era.
But when the history book in his mind reaches its final page, it does not record a golden age. Instead, it shows a woman ruling from behind the curtain...
On the night Wu Zetian enters the palace, Xue Guan feels for the first time that his blade may be able to cut down enemy nations, but not the decree of fate.
