Invincible Escort

Jang Cheon-un, the son of a third-rate martial artist. After losing his father and living as a member of a thug gang, he one day saves an old man who is on the verge of death by the riverside.

Living with him and learning martial arts in his dreams while training, he catches the eye of the chief strategist of Gucheonseong, who pursued the old man, and enters Gangnyeon Valley in order to become the guard martial artist of the young city lord.

As time passes, Cheon-un grows into a guard martial artist capable of standing on his own, and becomes the young city lord’s guard. But movements to usurp the city lord’s position arise within Gucheonseong, and he, who must protect the young city lord, gets swept into the center of the conspiracy...