Drawn by the jade pendant from the ancient tomb, the soul of the history graduate student passed through Dajing and became Su Qingyan, a sin slave who was implicated by the emperor Xiao Jinyu. Because she bumped into his "dead wife", she was reduced to a substitute in the palace, whipped, placed under house arrest, and riddled with misunderstandings. Little did she know that the blood feud was framed by an adulterer, and that his "White Moonlight" was actually his biological sister.
He is a murderous and suspicious young emperor, locking up love with hatred, and sinking while taking advantage of her; she relies on modern wisdom to survive, but when the mother and son are separated in the palace, and the life and death confrontation on the battlefield, her love and hate are intertwined with him. When the background of the princess of her former dynasty was revealed, the two changed from enemies to allies, and joined hands to resist the invasion of neighboring countries and the court's pressure on the palace.
She lost her fertility, and he cut off the city to save her and was impeached. After going through many wounds, they finally held each other tightly. This sadomasochism started with a substitute and spanned the grievances of family and country. Even if she could never return to modern times, in the prosperous Chang'an, his country and the rest of his life were reserved only for her.