This is the third and final film of the ZA KARATE trilogy. Tadashi Yamashita reprises his role as the Karate World Champion. Local Japanese karate schools are not happy that a Chinese master will take over the Japanese karate organization and will do everything they can to prevent it.

Bronson Lee, a Japanese-American raised by his grandma in the harsh, poverty-stricken desert Southwest, returns to Japan to demonstrate his mastery of karate by entering the tournament that will determine the first World Karate Champion.