In the aftermath of World War II, karate competitor Choi Yeung-Eui travels to Japan with the hope of becoming a fighter pilot. Instead, an unexpected path unfolds before him when he encounters a seasoned martial artist named Gichin Funakoshi. Fascinated by karate's potential, Choi embraces a new identity, Masutatsu Oyama, and commits himself to mastering the art. This gripping film explores the formative years of Oyama's journey, showcasing his determination, skill, and the creation of his renowned karate style, Kyokushin.