Yan Qing, a talented graduate of a prestigious university, is a pianist, a highly qualified infant caregiver, and the winner of an international design award. After upheavals in her romantic and family life, a twist of fate brings her into the wealthy Lu family's home. The Lu family's three-month-old twins are notoriously difficult to soothe, yet they become unusually well-behaved whenever they see her. Lu Zhan proposes a three-year marriage contract, asking her to marry him and become the children's mother. Yan Qing initially plans to walk away when the contract expires, but she gradually finds herself becoming indispensable to the two children, while the cold and distant Lu Zhan goes out of his way to protect her. As people and events from her past keep resurfacing, she discovers that this marriage is far more complicated than she ever imagined.