When Jung was a child in the city Chul Ju, Korea in 1565, his family was killed along with the rest of the village by Japanese forces on their way into China. Jung was rescued by a an immortal warrior who took him to the legendary Bul Kuk Sa temple where he grew up learning the martial arts Hwa Rang Do and became a Hwa Rang Knight. When Jung reached the point where the Hwa Rang Knights couldn’t teach him anymore, he went on a pilgrimage searching for knowledge, which would make him a god. In 1587 on his journey he rescued the son of the emperor who in return made Jung a Horseman. The seal he would carry as a Horseman would give him 20 warriors for protection if he should need it. At some point, Jung traveled to Japan. In 1592 he was on a mission to assassinate the Shogun. The mission failed and Yung-Un, the woman he loved was killed.
In 1996 the seal was stolen by a man called Tommy-Q who wanted the secret of immortality. Fighting his way thru Tommy-Q’s warriors, Jung got his seal back.