In order to avenge her family being framed by a powerful minister, Shen Zhaozhao, the hidden concubine, hid multiple vests such as a poison master, a palace spy, and a private adviser. She entered the palace with a weak appearance, and used different identities to attack her enemies (the Queen Mother, the noble concubine, and the powerful minister) in the palace battles. At the same time, she tested each other with the emperor Xiao Jingheng (the leader of the spy organization). The two went from rivals to lovers, and finally revealed the truth, succeeded in revenge, secured their position, and achieved two-way redemption.
