High school student Kiichi is on the fast track to martial arts super-stardom. An expert in the deadly Nanshin Shadow Style, he faces the challenge of his life: the long-awaited grudge match with his father's arch-nemesis, the champion of World Pro-Wrestling! Fists fly and blood spills as a new breed of fighter takes to the ring!

Iron Kiba challenges Key-bo's father to a death match, only to be refused time and again. A scheme is hatched to send an assassin against Key-bo in order to bring Key-bo's father to seek revenge. Key-bo must fight or die!