非认可地区。正在进行着非法的赌博比赛的MEGALO拳击手JNK DOG，虽然有实力却只能靠打假赛为生，他为这样的自己感到焦躁。但是某一天，他与能打破这样日常的“命运”相遇了——以融合了肉体与“装甲技术”的究极格斗技·“MEGALO BOX”为舞台，男子之间的热血战斗开始了！

Years after his victory at Megalonia, Joe has become a completely different man, going from one underground ring to another, now fighting as the wandering boxer Nomad.