Yo-han is the son of a Christian minister. Following his father's career, he joins the seminary without much enthusiasm, then drops out. After doing his military service as a KATUSA, he teaches at the U.S. educational center. When he is given a job teaching in America, he hastily marries in preparation for the move. He is suddenly struck blind, then begins contemplating suicide. Instead he has a religious vision and dedicates himself to the ministry, and opens a church for the blind.
Passing through a jail and a construction site, a young laborer meets a middle-aged man returning to Sampo after ten years' absence. Together, they track down a young woman who ran away from the restaurant she was waitressing at, but instead of turning her in for a reward, the trio decide to go on an adventure together.
After the Japanese Invasion of Korea in 1592, Iljimae, a master of the interlaced sword method, heads to Japan to find the national treasure, the Cheonryongsword, which was robbed by the Japanese pirate Kuroda. Around this time, there were two more men looking for Kuroda, one of them was Ma-cheol, a one-armed swordsman who lost his left arm due to Kuroda's trick, and the other was Kuroda's henchman Okamodo, who lost his newlywed wife and even lost his own eyes. This is Yoshiyama, the swordsman who lost his mind. At first, the three knights, who met by chance, were wary of each other for their own goals, but were captured by Kuroda's persistent pursuit. In the end, after a bloody fight, they succeed in revenge, and Iljimae returns home with the recovered Cheonryongsword.
A group of swordsmen takes on a hard-fight battle to possess a precious sword named Loegeom. Ahn Gil-won, one of the swordsmen, heads to enemy camp by himself, looking for the sword. He manages to swipe out the gang of enemy, finds his sword and heads on his way with his lover.
His parents captured by the Baekje armies, prince Eo-jin infiltrates the enemy castle alone to seek revenge. His plot is ruined when he falls in love with a princess there and is forced to choose between betraying his parents and nation or the woman he loves.