Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.
A movie about Genji, a Yakuza and his gang who try to break up an anti-Japanese group and Joseon's number one fighter, Kang-il during the Japanese colonial era.
The Wind Fighter's master, Master Heaven's legend begins. The master of Karate and Choi Bae-dal's master, Cheon Seung, is Joseon's greatest fighter. The legend that was never recorded is about to begin.
