After defending his Japanese Featherweight Champion title, Ippo Makunouchi finds himself facing a new challenge as his rival, Ichirou Miyata, returns to Japan to vie for the Featherweight belt in the Oriental Pacific Boxing Federation. As international competition looms, Japan's top fighters must decide whether they can rise to the occasion and secure victory against formidable opponents from around the globe. In a reversal of roles, the champions must now become challengers, showcasing their indomitable fighting spirit and calling out to the world for a showdown of epic proportions.