Grand Princess Li Yun Zhen is rumored to live a decadent lifestyle, with many bodyguards serving as her male concubines. She is uncharitable and merciless. She also holds real political power in court. Emperor sends the handsome Gu Xuan Qing undercover in the Princess' manor to gather evidence of her corruption and topple her regime. But the more the royal guard learns of the real princess, the less she fits the rumor, and he starts to fall for the princess.