Yu Su accidentally awakens and discovers she is the toxic supporting female character in a wealthy-family novel. In the book, she treats her children coldly and ends up in a tragic downfall, while home tutor Zhong Qianli steps in to take her place, winning the genuine affection of her husband and three sons. The system assigns a task: only by collecting the family's affection values can she rewrite the tragic ending. Yu Su, who previously ignored her children, has a sudden epiphany and takes the initiative to get close to her three sons, exposing Zhong Qianli's step-by-step scheming little tricks. While resolving family conflicts, winning over her aloof husband Qi Ye and her sensitive children, she also fights against the backlash of the original plot. As family bonds slowly sprout, will she be able to gather all the affection values and break free from her destined tragic fate?