Yaoyao, a spirit fox from Qingqiu, descends the mountain on a mission to accumulate good deeds and clear her clan's name. Initially mistaken for a bringer of misfortune and driven away by ordinary people, she is rescued by the kind-hearted Fifth Prince's Consort, Su Yunxi, who adopts her as her daughter. Using the spirit pearl within her body, Yaoyao secretly lifts curses and heals injuries for her adoptive parents. Twice, she accurately warns of danger and saves the Emperor, earning his trust and being bestowed the title of Lucky Star Commandery Princess. However, the First Prince, Murong Jin, joins forces with an evil sorcerer serving as the Imperial Preceptor to repeatedly plot against her and spread rumors that Yaoyao is a fox demon responsible for the plague. With her innocent heart and magical spirit pearl, little Yaoyao repeatedly exposes conspiracies and protects her family and the people. In the end, the truth comes to light, and she clears the spirit fox clan's thousand-year-old disgrace.