Legendary director Chang Cheh teamed his latest big star, Alexander Fu Sheng, with future Venoms Lo Meng and Kuo Chue to create another winner in his vaunted filmography. Joining them were the top supporting actors and the prettiest starlets, for an entertaining, exciting tale of a kung-fu blacksmith taking on four famous robbers while a villainous gambling boss plots to destroy them.

本片拍於1976年，由罗臻执导、倪匡编剧，剧情充满奇幻色彩，并由影帝狄龙领衔主演。故事描述广西蛇山中有三条巨蛇──蛇王子(狄龙 饰)、黑蛇(吴杭生 饰)及黄蛇(汪禹 饰)；一夜三蛇化成人形与苗寨男女载歌载舞，蛇王子更因此爱上苗寨女子黑琴(林珍奇 饰)。后苗寨旱灾，蛇王子答应率蛇作法，引水入寨，但条件是要娶黑琴为妻……