After retirement, Lin Wan hides her identity and transforms into a grassroots cleaner, secretly investigating her son's fiancée, Su Man. Unexpectedly, inside the company, she is publicly misunderstood and harassed by Su Man. Faced with the situation before her, Lin Wan handles matters calmly and cancels the engagement banquet. Through layer upon layer of investigation, Lin Wan gradually discovers many hidden problems behind her husband Gu Jianming, the third party, and her son. She adheres to her principles, picks up legal weapons to safeguard group rights and interests, and purges internal hidden dangers within the enterprise. Having experienced this series of disturbances, the astray Gu Chengchuan suddenly awakens and chooses to delve into the grassroots to temper himself. Lin Wan reorganizes the Gu Group, leading the enterprise to break through numerous obstacles and move toward a brand-new stage of development.