Gogo Matsumoto, an 11-year old aloof martial arts prodigy, along with her half-demon older sister; Nono, her mama; Mama, and her cool pet frog; Coolfrog, embark to compete in a martial arts tournament that pits humans against a near-infinite barrage of demons from another realm called the Akumugai. If a human can come out triumphant, they will be granted a wish from the Akumugai's warlord, Emperor Koro. Can Gogo overcome this impossibe challenge?