Niuniu is a five-year-old girl with pigtails and a round face, living alone with her mother until her mother's death. She possesses a mysterious system that teaches her fortune-telling, divination, martial arts, and other skills, rewarding her with merit points for successful tasks. Brave and intelligent, she uses a turtle shell to defeat human traffickers and rescue a prince. She loves flowers, cats, and is deeply attached to her mother. After being brought to the Helian family estate, she gradually becomes the cherished little princess of the family, charming her grandmother and uncles with her sweet nature.