After moving into her new home, young project manager Su Qiao encounters a series of troubles caused by her neighbor, Zhang Cuiping, including clutter blocking the hallway, noise disturbances, and malicious provocations. Armed with reason, evidence, and regulations, Su Qiao gradually moves from passive defense to joining forces with the entire building to establish a neighborhood code of conduct, eventually winning the support of her neighbors. Zhang Cuiping goes from being domineering and confrontational to being forced to back down. After repeated confrontations, her son's persuasion and the undeniable facts finally lead her to sincerely repent. In the end, the two women reconcile over a warm bowl of porridge late at night. The entire building transforms from chaos into a civilized community, illustrating the theme that the best neighbors are ordinary people who respect boundaries and treat one another with mutual respect.