Megalo Boxing is a popular sport in this world similar to boxing, except the boxers fight while wearing a metal frame which makes their attacks much more lethal. Junk Dog is a young man who fights in underground illegal rings. After Nanbu persuades the mob boss Fujimaki to forge Junk Dog an ID under the name Joe, the two are given 3 months to achieve their goal of working their way to the top of the Megalo Box rankings in order to have a chance of fighting in Megalonia.
