The Tournament

A sister of a martial arts student is kidnapped by gangsters. They are willing to give her back in exchange for ransom, which the brother does not have. However, he heard about Thai boxing matches for money. Thus, he goes to his master for help. The master has doubts about going to Thailand and putting out Kung Fu against Thai boxing, but he eventually agrees. Unfortunately, the student dies on the ring and ashamed master Liu returns to Hong Kong. The Martial Arts Association turns its back on him and revokes his membership. Devastated master commits suicide. Nevertheless, his daughter Lau Siu Fung
and son
decide to avenge their father by taking on the oblivious members of the association and Thai boxers.