Twenty-three years ago, the daughter of the Xu family was swapped at birth and left destitute. Twenty-three years later, the stray girl Xu Nian is brought back to the Xu family by Xu Zhengting because of a crescent-shaped birthmark at the end of her eyebrow. A blue swaddling cloth, old hospital records, and a nurse's testimony gradually uncover her identity, yet also provoke evidence destruction, framing, and forged parent-child DNA tests. Facing wave after wave of obstruction, can Xu Nian reclaim the life that was stolen from her? This time, can the father hold onto the daughter he has regained after losing her?