Hualuo, who was highly skilled in medicine, was passionate about chivalry and righteousness when he was young. He transformed into a "crusader" and slaughtered evil people everywhere. However, due to the county magistrate's murder case fourteen years ago, he was framed by Wang Cheng and became the murderer. From then on, he gave up being a killer and devoted himself to medical treatment, raising the county magistrate's orphan Sun Yan. He was determined to cure Sun Yan's blindness and redeem himself. Fourteen years later, the Yellow Turban Army rebelled and the world was in chaos. One day, in a small town called Qiao County, a strange disease broke out and the medicine boy of the famous doctor Hualuo died. Hualuo concluded that the disease was related to the blood of a lizard called Styron, and he was also searching for it as a medicinal lure to treat his female disciple. He gradually uncovered the truth and found out that the culprit was actually the bandit who had framed him back then. In order to punish the criminals who commit crimes and indiscriminately kill innocent people, Hualuo obtained a drug lure and changed his true identity as a chivalrous swordsman to fight to the death against the enemy