In the autumn of 1997, Chen You Xi escaped from the orphanage, to find her missing best friend Xiu and came to Tanling County alone, because of that. Before her disappearance, Xiu worked as a nanny for the Li family, and after her disappearance, the Li family accused her of running away after stealing from them. You Xi is very sure that Xiu didn't do it, and the family is highly suspicious. Soon, You Xi finds out that the Li family's daughter Li Wen Wen, also went missing many years ago, and she was in similar to her age. So, You Xi decides to pretend that she is Li Wen Wen and enter the Li 's family house, to find the truth, about both girls disappearance.