Invincible Guard

“I will not sacrifice my life to protect you. I will become invincible to protect you!” Jang Cheon-Un, who lived as a back-alley thug after losing his bodyguard father, begins learning martial arts in his dreams every night after saving a dying old man. Caught up in a chance incident, he enters Gucheonseong, the greatest sect in the world. After enduring all kinds of contempt and grueling training, he becomes the bodyguard of the young lord, Sama Gyeong; however, the blades of conspiracy and betrayal surrounding the power of Gucheonseong are aimed at the young lord and Cheon-Un…