Xu Nian was doted on by his parents for twenty-four years, but when his biological daughter Jiang Yue came to visit, he learned that he was a child "secretly exchanged" by his father Xu Jianguo. At that time, Xu Jianguo mistakenly misunderstood his wife's words of "changing diapers" as "changing daughters." In order to relieve his wife's postpartum depression, he put his crying biological daughter Jiang Yue in the hospital nursery in exchange for the well-behaved Xu Nian. Jiang Yue has endured hardships in the countryside since she was a child. After successfully searching for her relatives, the two families worked together to trace the truth of the year, which unexpectedly involved serial baby exchanges, hospital concealment and other secrets. In the end, Xu Nian found clues about his biological parents, Jiang Yue also integrated into the Xu family, and the two sisters gained double the love and happiness in their misplaced lives.
