Around 500 years ago, at the palace of Sesshömaru's mother, she and Zero waited as Töga and Kirinmaru destroyed the Grim Comet. In the present day, Zero steals the seal from Miroku containing Setsuna's demon blood and dispels it, making her lose control of her demonic powers and begin a rampage becoming a monstrous butterfly. Sesshömaru and Tötösai react as they feel Setsuna's stronger demonic power, with Sesshömaru stating that she still cannot suppress her blood. Towa and Moroha attempt to stop her to no avail until Miroku's eldest twin daughter Kin'u learns the situation from him and both she and Hisui come to their assistance...