Although Shen was born in the market, he is an excellent cook. When she was young, she became friends with Shen Dieyi, who had a good family. However, Dieyi died of illness, leaving a mystery of his life. In order to get to know each other, Shen married Dieyi to Chang 'an, trying to uncover the mystery of Dieyi's life experience. Yiyi pretends to be a man. By chance, she met Yang Zi 'an, who was given an imperial edict to remain anonymous, and mistakenly entered the Shangyi Museum.
Two extraordinary teenagers became a pair of accusers in Chang 'an, and a huge conspiracy gradually surfaced. On the outskirts of Chang 'an, the bullied Shen was rescued by the lovely girl Shen Dieyi who passed by. From then on, they became good sisters who talked about everything. Unfortunately, the good times did not last long, and butterflies withered in the flower season.
At this time, Dieyi's father told Yi Yidie the mystery of her life experience. In return, Yiyi married Tang Jiuhua's family in Chang 'an instead of Butterfly. In the palace, the emperor summoned Yang Zi 'an and ordered him to hide his identity and enter the Shangyi Museum to secretly investigate the corruption of the imperial court. The wedding team met a mountain thief on the road, but Yiyi dressed up as an ugly girl, but was still stopped by bandits.
It turns out that this separatist regime was planned by one hand, so as not to bring trouble to the Shenyang family, nor to really add him to the Tang family.