Shen Zhaoning, the daughter of a spy from the former "Secret Guard Camp", sneaked into the Daqi palace as a showgirl in order to repay her family's life-saving grace (her father died in the line of duty while protecting the current emperor Xiao Jingheng's father). On the surface, she is intellectual and elegant, but in reality she is sinister and rebellious. With her intelligence gathering ability and strategic planning wisdom, she resolves the difficulties faced by the green tea concubine, the entanglement of the yandere prince, the frame-up of the jealous nobleman, and the scheme of the hypocritical queen mother. During the process, he and the emperor Xiao Jingheng went from testing each other to loving each other, fell into crisis due to his identity as a spy, and relied on strategy to turn the tables; at the same time, he revealed his wealth-obsessed nature (collecting palace treasures), and adopted a cute little prince (Xiao Jingheng). Heng's younger brother, the orphan), experienced jealousy farce (the male protagonist was jealous of the young prince/fellow spy), backstabbing of close relatives (sister Shen Zhaoyue betrayed in a fight for favor), and finally became the queen, slapped all the villains in the face, and achieved repayment and self-salvation.