On a rainy National Day night, Zhou Guifen takes in her husband's two children from his previous marriage. The children feel fearful inside and walk on eggshells. Zhou Guifen is tough on the outside and soft on the heart, giving the children a secure sense of belonging, letting them understand that making mistakes will not lead to abandonment. Twenty years of time pass, the brother and sister achieve success in their careers, purchasing a new home to show filial piety to Zhou Guifen. Their biological mother comes knocking to demand them, and a few words from the brother and sister express years of nurturing grace, spelling out that companionship and protection are far more precious than blood ties.