Zhu Qingyi, a highly accomplished career woman, sends her daughter, Zhu Ningning, to stay with her ex-husband, Lu Huaijin, while she goes abroad to handle work matters. Lu Huaijin, a CEO who has always been completely devoted to his career, suddenly finds himself thrown into the daily routine of raising a child. The mischievous and clever Zhu Ningning turns his work and personal life upside down. She even follows her dad back to the Lu family mansion, winning over her grandfather, grandmother, and uncle, Lu Huaiyuan. Through their playful antics and constant companionship, the family gradually learns to get along. When Ningning unexpectedly falls ill, Lu Huaijin truly comes to understand the responsibilities of fatherhood. Eventually, the two parents reach an agreement to raise their daughter together and accompany her as she grows up. At Ningning's birthday celebration, the whole family enjoys a warm and happy time together.