The female lead Xiaoxiao had her identity swapped with her sworn younger sister Huanhuan. However, this swap happened because Xiaoxiao's biological parents mistakenly thought Huanhuan was their own biological daughter, and regarded their actual biological daughter (Xiaoxiao) as their adopted daughter. Her biological elder brother also believed this, and from then on, he had all kinds of misunderstandings about Xiaoxiao, beat her, and even sent her to a detention center.After Xiaoxiao was released, it turned out that her adoptive father was the world's richest man. He made those who had bullied Xiaoxiao in the detention center suffer the same treatment that Xiaoxiao had endured. Her adoptive father treated Xiaoxiao extremely well. After Xiaoxiao returned home, she wanted to see her grandmother, but her biological parents continued to make mistakes repeatedly, and thus lost Xiaoxiao forever.
