Taking place in a mystical realm influenced by ancient Chinese culture, the tale follows Fuuren, a Defender lacking arms. These Defenders are known to fulfill their duties unwaveringly, provided they agree to undertake them. After being summoned to a small township on the brink of being captured by the Ka empire, they request Fuuren's aid in protecting their village from being overrun. Amidst the political turmoil brewing within the town, Fuuren agrees to a distinct mission.