Lin Wan, a modern urban mother, voluntarily looks after children in the open ground-floor area of her residential complex, charging only shared costs for group classes, picture books, and other expenses. Zhou Ke, a new neighbor, causes trouble under the pretense of offering free childcare, spreading rumors that Lin Wan is making money from price differences. She takes over the group chat and the children's list, steals the childcare arrangement, and even uses Lin Wan's name to create a fake business sign. Armed with evidence, Lin Wan repeatedly exposes Zhou Ke's schemes. Eventually, she establishes a properly registered childcare service with transparent prices and clearly assigned responsibilities. After being forced to issue refunds and publicly clarify the truth, Zhou Ke starts learning the trade properly. The neighbors stop using personal favors as a means of coercion, and peace and warmth return to both households.