Ziyue has been showered with meticulous care and affection by her elder sisters. Accustomed to being protected, she repeatedly fails her exams. During the fourth Fairy Exam, she meets the mysterious fairy Hei Linglong. Unintentionally, the two of them break the seal of the Nightmare Queen, plunging Rainbow City into crisis. In the end, through their respective efforts, they finally earn everyone's recognition.