In the last years of the Tang Dynasty, when society was in turmoil, at the Wulin Rewarding Good and Punishing Evil Conference held every 18 years, the ten martial arts masters selected the Master of Yihua Palace as the chivalrous hero who was responsible for killing the ten evil men. Unexpectedly, he was stopped by the sudden arrival of the Master's husband Yan Nantian. The Master defeated Yan Nantian by one move, and the couple turned against each other. They vowed to teach a disciple to kill all the ten evil men in 18 years. To thank Yan Nantian for saving their lives, the ten evil men took on the responsibility of raising his son Xiaoyuer (Andy Lau) and wanted to train him to be the most evil man in the world. The Master of the Palace adopted Hua Wuque (Lin Qingxia), and taught him martial arts while instilling the idea that all men should be killed. 18 years later, the ten evil men and the Master of the Palace respectively ordered Xiaoyuer and Hua Wuque to compete for the leader in the new Rewarding Good and Punishing Evil Conference, and the two people's life trajectories began to intersect.