After the fairies defeat Gunala, the Evil Goddess, a new crisis strikes the Fairy Castle. Evil wizards have devoured the world's magical energy, and the Rainbow Flower, the source of that power, is close to withering, which would destroy the fairy world. The only hope is the legendary Rainbow Heart Stone, which can gather the lost energy back. To save their home, Prince Youle, Xiaolan and their new friend Xiaoqian return to the human world, where they join up again with Meiqi and Meixue to fight evil once more in this comedic magical girl series.