Born with an anomalous magical power that attracts monsters, infant Mia is abandoned in the mountains by her father to save their town, despite her brother Arthur's protests. Adopted by a legendary master, Mia grows into an incredibly overpowered five-year-old who effortlessly defeats ancient beasts while casually eating apples. Enticed by the promise of endless candy, she sets out to find her birth family. Meanwhile, Arthur, now a powerful wizard hunting the dragon that tore his family apart, tracks the beast to the same valley. Bound by matching jade pendants, the separated siblings are poised for a fateful, magical reunion.
