Spying a curious fox-like creature (voiced by Miyuki Sawashiro) while searching for a small mirror that once belonged to her dead mother, lonely teenager Haruka (Haruka Ayase) follows the magic beast to Oblivion Island, where all kinds of lost or forgotten items eventually wind up. Haruka asks her new animal pal to help search for the keepsake mirror, but the island's ruler has other ideas in mind.