Skilful swordsman, Lei Li is wrongfully suspected of a treasury house theft. Lung Er Zi, another swordsman and gang boss, further incriminates Lei Li by giving false evidence. Lei Li challenges Lung Er Zi to a duel, saying that if he loses, he will cut off his right arm and retire from sword-fighting, Lung Er Zi, fighting with a special stick, overpowers Lei Li, who true to his word, cuts off his arm.