After completing military service, Walter Gulick takes a job as a sparring partner at a gym, the owner of which sees potential in Walter as a professional fighter—and takes him under his wing.
Spor yazarı Erik, evsiz bir adam olan Champ'i sokaklardan kurtarmaya karar verir. Ancak bu kararırın ardında Champ'in kim olduğuna dair gizi ortaya çıkarmak vardır. Erik bunun gizli kalamayacak bir sır olduğunu ve Champ'in öldüğüne inanılan efsanevi boksör olduğunu düşünmektedir. Champ'in efsanesini diriltirken, onun bireysel macerasında babası ile olan ilişkisinin önemini anlayacaktır. Champ'in yaşamıyla ilgili gerçeklere daldıkça, kendi yaşamında geri plana attığı, yüzleşmekten korktuğu ilişkiler ortaya çıkacaktır. Erik kendi yaşamı ve ailesiyle olan ilişkisini gözden geçirecek ve uzun zamandır hiç yapmadığı bir şekilde kendisiyle yüzleşecektir.
Shinji and Masaru spend most of their school days harassing fellow classmates and playing pranks. They drop out and Shinji becomes a small-time boxer, while Masaru joins up with a local yakuza gang. However, the world is a tough place.
The film's story is a prequel to the Fist of the North Star depicting the one year interval between Kenshiro's defeat at the hands of Shin and their later battle. Unlike the others in the series this film has a completely original storyline in which Kenshiro, near death after his battle with Shin and having used his remaining energy to kill a pack of wolves, was captured by slavers. Due to his strength, Kenshiro could escape whenever he wanted, but chose to stay and protect the other slaves.
The story of two men, a veteran boxer who is down and out, and a young man who is just starting his life and boxing career. Their fighting careers cross paths as their lives and fortunes head in opposite directions.