In a conspiracy three years ago, Su Nian took away a secret. Three years later, in order to protect her children and the stability of her family, she was forced to marry Lu Yan, the leader of the Lu family. On the wedding night, she spread out the agreement and said calmly: "Mr. Lu, please sign the agreement to leave the father and keep the son." Marriage is a transaction, the child belongs to her, and neither of them interferes with each other. But the man who was rumored to be cold and distant refused to put pen to paper. Lu Yan said that the marriage can be concluded but the agreement is invalid. From then on, he shielded her from open fire at wealthy banquets, and approached her in the study late at night to ask for the truth. Even the wedding ring seemed to have been premeditated. Su Nian just wanted to get away, but step by step she was trapped in a web of gentleness and strength. Fate cannot be clearly stated in an agreement. Marriage first, love later, leaving the father and leaving the son? No, Mr. Lu wants a wife and children, and he also wants her to be sincere.