Yim Wai colludes with Japanese master Tanaka to challenge Shek King-To’s martial arts club. Severely beaten Shek’s last words for his daughter Chi-Ying are to resort to his senior Tse Cho-Fu. In order to avenge the insult, Fu creates a new technique combining Chinese kung fu and Siam boxing. On the other hand, Chi-Ying finds Sai-Ho and practices unique techniques with him vowing to get even with Tanaka.