Following the defeat of Gunala, the malevolent Evil Goddess, a new peril befalls the Fairy Castle as the maleficent wizards drain the world's magical essence. With the Rainbow Flower fading, the realm faces imminent destruction. To avert this catastrophic fate, Prince Youle, alongside Xiaolan and their newfound comrade Xiaoqian, embarks on a quest to the human realm. There, they must reunite with Meiqi and Meixue to combat the forces of darkness once more and retrieve the fabled Rainbow Heart Stone, essential for restoring the dwindling magic and saving their imperiled world.