In Japan, Jubeh Yakyu is notorious as the most formidable and dangerous young delinquent. His life took a dark turn when he unintentionally killed his father with a lethal, supercharged fireball pitch. This tragic event led him to abandon baseball and embrace a life of crime. Now, at 17, he finds himself incarcerated at the Pterodactyl Juvenile Reformatory, a facility for the most hardened young offenders. The reformatory is ruled with an iron grip by Headmistress Ishihara, whose grandfather was a Nazi collaborator during World War II, and her cruel assistant, Ilsa. Upon his arrival at this dreadful place, Jubeh discovers from Governor Mifune that his younger brother, Musashi, who had been involved in a killing spree, was also imprisoned there but had mysteriously died.