The single mother who was in charge of the family worked tirelessly to raise her four children on her own. However, when they grew up, they faced big problems: the eldest brother Jiaxing wanted to marry a wife, the second brother Jiawang and the fourth sister Taozi had to go to school, and the third sister Huanhuan wanted to find a wife. There are many grievances among them, but the kind-hearted sister-in-law resolves the grievances with gentleness, heals the trauma with companionship, and breaks her heart for this family. Of course, this is a story about a family's shortcomings.