When a thieving cyclist steals a purse from a pedestrian, clumsy, naive yet honest rookie policeman Sang-hwan gives chase, but it's the skilled specialist in martial arts, Wi-jin, who captures the criminal while severely injuring Sang-hwan. She brings Sang-hwan to her home, where five Masters of Tao heal him and find that he has a powerful c'hi (spiritual energy of the universe). He could be a powerful warrior. As Sang-hwan begins training to ascend to the level of a Maruchi (male Tao Master), the evil, ancient and ambitious Heuk-woon, accidentally released from his imprisonment, awakens. The powerful Heuk-woon attacks the masters, searching for a key that they protect, which would permit him to become an Arahan and dominate the world. When the masters are defeated, Sang-hwan and Wi-jin are the only and last hope of mankind.