Divorced working woman Gu Nian raises her daughter alone and painstakingly purchases property. After her younger brother Gu Chuan's fiancée Han Xueling moves in, she makes unreasonable demands, asking Gu Nian and her daughter to move out, and also wanting to add her name to the property deed. Facing family affection and the other party's step-by-step scheming, Gu Nian is calm and rational, collects evidence, and uses the law to safeguard her and her daughter's legal rights and interests. In the process, family members slowly wake up, and the younger brother also recognizes reality and corrects his mistakes. The family clarifies the boundaries of family affection, understands that family affection cannot be extorted, and finally guards each other, harvesting a warm and stable life.