Lin Fu is a destitute young man from the ferry crossing on the Cold River. By chance, he meets Su Mo, a martial arts master who has left the Black Wind Hall, and learns the "Green Duckweed Heart Method" and the "Green Duckweed Sword Art". From then on, he steps into the treacherous, turbulent world of martial artists. His master is surrounded while protecting him, and Lin Fu sets out alone with the secret manuals and his master's final instructions. He braves the mountains and forests, encounters heroes, and battles bandits. From a boy who can only dodge on instinct, he gradually grows into a swordsman with a strong sense of justice. As he searches for his master's whereabouts, Lin Fu uncovers the secret of the "Black Iron Classic", joins the Wangjiang Escort Agency to fight the Mountain Wolf Gang, and faces the Black Wind Hall's overwhelming bloodlust. Amid flashes of blades and swords, he stays true to himself and uses his sharp blade to cleanse the martial world of its corruption, forging a young hero's legend of legacy, revenge, and chivalry.
