Qin Yueying, president of the Shenghai Chamber of Commerce, disguised herself as her twin sister and returned to the Chen family to save her seriously ill sister. Facing a husband who betrayed their marriage, an eldest daughter trapped in marriage, a truant and rebellious second son, and a crazy fan-girl youngest daughter, she used iron-fisted methods to straighten out the whole family, allowing the three children to reclaim their lives. After her identity was exposed, the children had long since recognized her and sincerely called her Mom. In the end, Qin Yueying recovered the family property, her sister recovered and got a divorce, and the whole family ushered in a new life.