Investment genius Xu Guanguan, born with extraordinary strength, is betrayed by her boyfriend. To save her seriously ill grandmother, she enters into a marriage of convenience with CEO Shen Yunchen and becomes the full-time stepmother of his three children. Facing the children's wariness and their individual emotional struggles, she protects them with sincerity, intelligence, and her extraordinary strength, gradually earning their trust. The children's biological mother returns to the Shen family to fight for her own interests, repeatedly stirring up trouble and even becoming involved in a kidnapping. Xu Guanguan bravely steps forward to rescue the victims and protects her family through one crisis after another. Meanwhile, she and Shen Yunchen gradually transform their contractual marriage into genuine love, ultimately finding warmth in both family and romance.