Shen Qingli, the legitimate daughter of the Prime Minister, was set up to die tragically in her previous life because of her talent, reputation and family fortune. After her rebirth, she abandoned her reputation as a talented woman and practiced treacherous poisonous techniques, vowing to make her enemies pay for their sins in endless pain. She took the initiative to approach Xiao Jue, the "silly king" who had a humble biological mother and was bullied, but she didn't know that the other person had also been pretending to be for many years and had a blood feud.
The two started from an agreement to use each other, and moved forward side by side in the bloody battles in the house and the court. She spins a web with poison and controls people's hearts invisible; he hides his edge in his clumsiness and spreads the world in a chess game. From the back house to the palace, from their own country to the enemy's country, they work together to tear apart the hypocrites and destroy the ambitions of the conspirators.
Finally, when all the enemies were wiped out and the world was settled, she asked him: "Now that the great revenge has been avenged, what do you want?" He took her hand and gently placed the jade seal in her palm: "Everything you lost in the previous life, I want this country as my betrothal in this life, and I will pay you back double."
