During the genealogy registration ceremony at the Gu family ancestral hall, Shen Lingyi, who disappeared five years ago, suddenly returns. Bai Wanning publicly mistakes one child for another, and two boys with identical appearances bring a buried past to light. As the truth about the triplets gradually emerges, the long-sealed grievances between the Gu and Shen families are investigated and revisited. When the whole truth finally comes to light, Gu Chengzheng awakens to his mistakes. Although names can be restored, lost time and the people he missed can never be brought back.