Zhang Peng is a famous playboy in the circle. One day, at a grand party, Zhang Peng's ex-girlfriends joined hands to seek revenge on him, causing Zhang Peng to fall into the swimming pool by accident and lose consciousness. When Zhang Peng woke up, he found himself in a magnificent palace, and a maid named Luli (played by Hai Ling) actually called herself "Niangniang". It turned out that Zhang Peng had not only traveled through time and space by mistake, but also changed her gender. At this time, her identity was Zhang Pengpeng (played by Zhang Tianai), the wife of Prince Qi Sheng (played by Sheng Yilun). However, Qi Sheng did not love Zhang Pengpeng. What he was thinking about was his childhood sweetheart, Jiang Yingyue (played by An Yongchang), the wife of King Zhao. At first, Zhang Pengpeng, who had a girl's body but a man's heart, kept her distance from Qi Sheng. However, she gradually realized that in this deep palace, if she could not get Qi Sheng's protection, her life might even be in danger. At the same time, the strange changes in Zhang Pengpeng attracted Qi Sheng's attention.