Chao Chao's biological mother was framed and lost her virginity. She committed suicide after giving birth to her. She became an orphan and was adopted by the regent who was known to be a manly man. She was handed over to the Queen Mother to prove her innocence. The regent promised to protect her, the emperor wanted to make her a princess, the queen mother recognized her as her granddaughter, and the princes also regarded her as their sister. Chao Chao can understand the language of animals, use mice to find out the assassin, use the queen mother's cat to know the truth about the prince's poisoning, and use the big dog to figure out the reason why the beautiful uncle was bewitched. She is regarded as a lucky star and becomes the only princess of Dasheng. The biological mother's family came to recognize her, but the regent refused domineeringly. Later, everyone discovered that Chao Chao and the Regent looked more and more alike, and it turned out that the two were real father and daughter.
