Childhood friends Baek Dong Soo and Yeo Woon are both prodigies in combat. But while Baek Dong Soo became the top swordsman in the land, Yeo Woon would go on to serve a group of clandestine ... Read allChildhood friends Baek Dong Soo and Yeo Woon are both prodigies in combat. But while Baek Dong Soo became the top swordsman in the land, Yeo Woon would go on to serve a group of clandestine assassins whose aim is to overthrow the throne.Childhood friends Baek Dong Soo and Yeo Woon are both prodigies in combat. But while Baek Dong Soo became the top swordsman in the land, Yeo Woon would go on to serve a group of clandestine assassins whose aim is to overthrow the throne.