Hyun-sung Park was once a promising boxer but after he experienced deep frustration at Olympics for twice, he took a wrong turn. He joined a gang and tried to suicide, but miraculously survived and is now managing a small gym at Yeongdeungpo. Ju-young Park who almost passed a civil service examination suddenly gave up on everything and restarted her life as a boxer. Two people who were living in completely different world met each other and made a unique story.