A boxer known as Junk Dog scrapes by in the slums, throwing matches for the mob's underground racket; Junk Dog gets into an unexpected altercation with a champion boxer.

Yuri shows up at one of Junk Dog's matches and tests the young boxer, giving him a new ambition.

Joe and his manager, Nanbu, attempt to find a better set of gear for Joe's first official match.

Joe decides to forego using gear in the tournament, which constitutes a major risk to his life.

Aragaki, one of Nanbu's former protégées, returns to seek revenge, putting Joe in harm's way.

Aragaki's superior training and experience put Joe at a major disadvantage in their match.