When the war between the Justice Alliance and the Heavenly Demon Coalition, known as The Great Demon War, was at its peak, Sim Ho lived in the peaceful village of Baekriju.

At the age of twelve, he had caught up in Jegal Hwi's plot to take over Baekriju and was dragged to The Cheonil Plain, the war's frontline. In the midst of a desperate battle, he encounters Black Ox Fighters, and they save his life. He is then assigned to their group and thus begins the arduous journey to learn martial arts so that he can grow into a powerful warrior and return home to Baekriju…!