Jubeh Yakyu, a notorious teenage delinquent with extraordinary pitching skills, is sent to the Pterodactyl Juvenile Reformatory following a tragic accident that claimed the life of his younger brother. Consumed by guilt and rage, he vows never to play baseball again. However, the sadistic warden, Ishihara, who runs the reformatory, discovers Jubeh's talent and coerces him into leading the institution’s baseball team, the Pterodactyl Gauntlet. Their first game is against the psychopathic and extremely violent St. Black Dahlia High School team, which is infamous for its brutal tactics and disregard for the rules.

Initially reluctant, Jubeh eventually agrees to play to protect his friends and survive the ruthless environment. The game quickly devolves into a deadly battle, where survival instincts are just as crucial as athletic prowess. As chaos ensues on the field, Jubeh faces off against both his adversaries and his own inner demons, grappling with the weight of his past and the possibility of redemption through unrelenting violence and carnage.