Sota, a young monk, has spent years in the quiet temple under the great waterfall, learning the sacred arts. But one day, he accidentally awakens a long-forgotten water spirit, Mizu, who had been sleeping beneath the falls. The spirit, appearing as a glowing girl, tells Sota that the balance of the temple has been disturbed by human greed. Together, they set out on a quest to find a stolen relic that once kept peace between the spirit world and humans. Along the way, Sota learns that the true power of the temple lies not in relics but in the harmony between nature and spirit.