Lei Li lost his right-arm in a sword duel with the master of a martial arts school, long ago. Now, he is able to defend himself well with just his left arm, and kung fu techniques. That he proves with just the help of his friend Chung-Chieng, when he crosses his path with a beautiful girl in need, Pao Chiao. Even against impossible odds, he will prove a great warrior.

A violent martial artist is bent on avenging his older brother, who was killed by a cabal of four wicked businessmen and a cheating wife.

Thần Đao Vô Địch Ân Khải Phong hàng năm thường hộ tống vận chuyển 20 vạn lạng bạc đến thủ đô. Trong năm nay, ông đột nhiên mất nội công nên không thể sử dụng thanh đao của mình nữa.