Shen Tinglan (the heroine), the daughter of an important minister of the former dynasty, was framed by the Queen Mother's party because of the injustice done to her family, and became an abandoned concubine in the cold palace. Three years later, in order to get rid of the behind-the-scenes and high-pressure control of the Queen Mother (evil mother-in-law), the puppet emperor Xiao Jingyan (male protagonist) urgently needs a "knife" to disrupt the situation in the harem and divert the Queen Mother's attention.
Jamel Xiao took Shen Tinglan out of the cold palace, and the two reached a deal: Shen Tinglan would play the role of the "devil concubine" to piss off the queen mother and rectify the harem, while Jamel Xiao would allow her family to be rehabilitated and free.
In the face of a series of vicious "mother-in-law and daughter-in-law" battles such as the Queen Mother's morning and evening attempts to make things difficult for her, rape of beautiful girls, and poisoning and frame-up, Shen Tinglan used green tea tactics and thunderous schemes to slap the Queen Mother's gang members in the face. The two stimulated the Queen Mother through exaggerated love scenes in front of others, but the Queen Mother gradually developed feelings for each other while testing and using each other. In the end, Shen Tinglan not only defeated the evil mother-in-law, but also acted with her for real, and even helped the male protagonist regain the imperial power and favor the Sixth Palace alone.
