On a warm summer night in a quiet village, Aoi notices strange glowing lights deep in the forest. Drawn by their gentle flicker, she ventures into the woods, where the air hums with the song of cicadas. There, she encounters an ancient fox spirit named Haku, who guards the balance between the human world and the spirits of nature. Aoi learns that the glowing lights are spirits of the forest, but they are in danger of disappearing forever due to the encroachment of the human world. Together with Haku, Aoi embarks on a journey to protect the sacred forest and the delicate bond between worlds.