Zhang Yunxia, a nanny consumed by jealousy, switches her newborn daughter, Lin Wantang, with Su Xiaoman, the newborn daughter of her employer, the chairman of the Lin Group. Twenty years later, the chairman becomes critically ill and needs a bone marrow transplant. Lin Wantang's bone marrow is incompatible, but Su Xiaoman unexpectedly proves to be a match. As the investigation deepens, the truth about the baby swap finally comes to light. Su Xiaoman returns to her biological parents and begins a new life with the Lin family.