Situ Jing (played by Zhang Nala) was the princess of the previous dynasty. Since the country was destroyed, Situ Qingyun and his wife couldn't bear to watch the little princess also be destroyed. He adopted her at home, loved her very much, and treated her as his own. Situ Jing has been unruly and willful since she was a child. Like a boy, she made friends with people of all kinds on the street. She was also nicknamed a crayfish and often dressed in men's clothing. I met the little emperor Zhu Yun (played by Su Youpeng) by chance, the two became brothers with similar interests, and Zhu Yun would always secretly go out of the palace to meet Crayfish. Situ Jing loves the common people very much and is kind-hearted and beautiful. Zhu Yun found that Situ Jing is a beautiful woman, and she is even more haunted in his dreams. By coincidence, Crayfish snatched Bai Yunfei's engagement bracelet again, and he did not know each other. Since then, the three have become best friends together. Situ Jing also has an elder brother named Situ Jiannan, who loves Situ Jing very much, and at the same time, he also falls in love with Wen Qiang, the daughter of the rival family..