Xu Sangning is the Xu family's biological daughter, yet she has been neglected by her family since childhood, while everyone dotes wholeheartedly on Xu Ruowei, the girl they adopted. Suffering from acute myeloid leukemia, she dies in agony amid endless neglect and becomes a wandering spirit, watching everything unfold. She sees her parents continue to lavish all their glory and affection on Xu Ruowei, and witnesses how the entire family will ultimately live with guilt over their past favoritism and coldness.