The Golden Sword school is attacked by bandits. The servant Fang Cheng sacrifices his life to protect his master Qi Ru Feng. In gratitude, Qi accepts the dying Fang Cheng's son, Fang Kang, as his student. Years later, Fang Kang is scorned by his snobbish fellow students because of his poor background. Deciding that he will only cause trouble for his master Fang Kang leaves the school only to run into his classmates and his master's spoiled daughter, Pei Er. In the ensuing fight Fang's right arm is cut off by Pei Er, who is angry at his indifference towards her. Stumbling away, Fang falls off a bridge into the passing boat of a peasant girl Xiao Man. Xiao Man nurses him back to health and the two fall in love. Fang Kang is nevertheless depressed as he is unable to practice his swordsmanship. Reluctantly, Xiao Man gives him a half-burnt kung-fu manual which she had inherited from her now dead parents. With its help, Fang Kang is able to master a new one-armed style of swordplay, making him stronger than before...