After Gu Qingyan marries Chen Haoyu, her younger brother-in-law's family lives rent-free in her marital home for three years. During that time, they grow from a family of three to a family of four, making the 90-square-meter apartment increasingly cramped, while their demands become ever more unreasonable. After a major confrontation, the conflict finally reaches a breaking point. Yu Shuwan comes to her senses and realizes she should no longer tolerate mistreatment to preserve her family or maintain the illusion of a complete home. She decides to take action and show everyone that women must stand up for themselves in unhealthy marriages. She sells the apartment and launches her counterattack, ensuring that the wicked are punished and good people can live happily.