In his previous life, he was the best instructor in the Blood Cult. After dying, he was reincarnated as Suryong Baek, a frail man who works at a small academy in the country side. However Suryong Baek knows how to fix his weak constitution, and to do so he needs both money and training. Thus he decides the best way to achieve his goals is to become the greatest teacher in a prestigious martial arts academy!