Kwon Eun-Soo is a taekwondo fighter from Seoul, South Korea. Kwon showed a lot of promise after being enrolled by his parents in taekwondo, but emotional turmoil with his father caused him to run away from his home and enter the dark world of underground street fighting, where he went undefeated for the longest time. Growing tired of the underground circuit, Kwon decides to enter the Sentoki tournament to face more unique opponents.