Six-year-old Nola, trained at Ash Monastery, possesses monstrous strength. After her mentor exhausts his magic, Nola descends the mountain with a god-slaying greatsword, holy potions she mistakes for candy, and 12 copper coins to locate her five long-lost foster siblings. Believing her siblings are impoverished due to her mentor's "Vow of Poverty," Nola sets out to "rescue" them. She smashes the Holy Light Church's hall in one strike, forcing out her eldest brother, Supreme Holy Knight Arthur—only to find him immensely wealthy. Riding a subdued abyssal dragon, Nola charges into the Demon Realm to save her second brother, Lucian. The brutal Demon King instantly turns into a fiercely doting brother upon her arrival. Thus begins an ultimate saga: a six-year-old cutie delivering a dimensional strike against the continent, backed by her all-powerful titan brothers.