Yun Yaoyao, an orphan girl from the Yun family, was burdened with a blood feud. She waited for an opportunity to assassinate the tyrant Tu Shanjin at a palace banquet, but she unexpectedly exchanged her soul with the emperor. The two were forced to live together, being suspicious of each other and hostile to each other, so they had no choice but to put aside their barriers and walk hand in hand. She worked step by step to clear the Yun family's grievances and expose the various conspiracies of her second sister Yun Yanyan. As they get along day and night, feelings gradually develop. Yun Yaoyao assists the monarch in implementing benevolent policies. Tu Shanjin promises to love only one person in this life and dismisses the harem. The two worked together to eliminate the traitors in the court, quell the chaos in the court, and restore peace to the world. Together, they wrote a touching relationship between the emperor and his concubine.
