The plot of this movie is based largely on a famous cartoon series by Bang Hak-Ki, which featuring Choi Bae-Dal, (1922-1994), who was a real person.  He moved to Japan during the colonial period and established himself as a much admired Karate fighter, by founding a new version of the Martial Arts form called Kyokushin Karate In 1934.  Eleven year old Bae-Dal (Yang Dong-geun), watches his father's farmhand Bum-Soo, fighting with Japanese officials in the market in Gimjae, Korea.  He admires Bum-Soo`s fighting skills and starts to learn to fight as well.