The optimistic and clever Xiaowanzi has been performing on the streets with her father He Yizhi since she was young, and she relies on her unique skill of "breaking stones with her chest" to make a living. An adventure in Ruyi Tower makes Xiaowanzi, who can't read, suddenly transform into a well-educated princess, marry into the Mei Mansion and marry Mei Sanshao, which completely changes her fate. However, Lu Yingyao, the daughter of the Ninth Prince, who was married by imperial decree, was mistaken by the bandit Xiaobaoye as the wife of the leader of the group and carried back to Qinglongqian. Mei Sanshao, who resisted this marriage, put on an attitude of rejecting people from a thousand miles away, hoping that the princess would give up. Xiaowanzi, who had to pretend to be the princess, also despised the cold and arrogant Mei family's third young master. In the battle of wits and courage, this pair of happy enemies gradually fell in love...