Homesick

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 similar in age to her. So, You Xi decides to pretend that she is Li Wen Wen and enters the Li family's house to find the truth about both girls' disappearances
(Source: Chinese = IQIYI || Translation = MDL)