The Diamond Gang commits a robbery. The leader Chiu Yee-kong wants to keep the booty and this arouses the suspicion of gang member Tai-wai. The police does not have a clue and thus invite Wong Ngung, Heung Ad and Wu Ngar for help. Kong is in accomplice with his third concubine. They order someone to steal the diamond and leave Wong's symbol. Wai turns his attention on Wong. Wong, Ad and Wu are not afraid of Wai and they throw him out. They sneak in Kong's apartment to investigate. Kong's second concubine is mad at Kong for neglecting her. She tells Wong the truth but gets killed. Kong's people surround Wong, Ad and Wu. Each of the three faces their enemy. Ad is tortured by Wai. Wong and Wu arrive in time and save her. One of Kong's people tells Wai the truth. Wai immediately attacks Kong. Wong, Ad, Wu and the police arrive at Kong's headquarter to arrest the gangsters. Wai is arrested but Kong has escaped. The diamonds are found. The inspector makes Wong, Ad and Wu as partners.

The Flying Dragon gang goes on a rampage and the police Inspector is at his wits' end. He then commissions Wong Ngung, Wu Ngar and Heung Nga to help him catch the gang members. Suet-ying, a young woman, is addicted to gambling and owes a huge sum to the gambling den that belongs to the Flying Dragon gang. She has even signed IOUs. When the younger sister of Ying's husband sees that Ying is weighed down by worries, she asks Wu Ngar for help. Wu Ngar sneaks into the gambling den, but her behaviour is suspected by the gang leaders, Tai-kit and Tai-hong. Fortunately, Wong Ngung saves her. To get back the IOUs, Ying falls under the control of Hong and Kit. Master Lung has evil designs on Ying. He first kills Kit and seizes Ying. Hong then shoots and kills Lung. Wong Ngung and her two partners get back the IOUs for Ying. They notify the police Inspector to arrest the members of the Flying Dragon gang. Hong is shot and injured by Wong Ngung. He is arrested with the other gang members.

Club 99 is not just a hideout for triad gangsters, but also a haven for smuggling jewelleries from robbery. When detective Law is investigating a jewellery heist, he is ambushed by the men from Dog Stone (Sek Yin-tsi) who is the owner of Club 99. Then, Law's daughter Fong (Law Yim-hing) helps her father to be undercover and disguises herself as a dancer in the club and gambler Lung (Lam Kau) is also an informant for the police force. While Dog Stone is cunning enough to discover their identities, there are in fact more undercover agents in the club...Influenced by Hollywood's semi-documentary style, the film has a detailed yet complex portrayal of human nature－undercover anxieties, domineering gangsters and moral ambiguity. With its realistic chasing and action sequences, the film is nonetheless a very entertaining piece of cinema.

Chin Ping Mei 金瓶梅 (1955) is a Hong Kong feature film written by Ku Wen-Chung and directed by Wang Yin, it was produced by Shaw Brothers Studio. This is an adaptation of the Lotus Pan tale.

The Opera Boat at Star Island 星 島 紅 船 (Xingdao hongchuan) (1955) aka The Opera Boat in Singapore is a Hong Kong film in the Cantonese language of the comedy and musical genre, directed by Ku Wen-Chung and produced by Shaw Brothers Studio.

1956 film from Hong Kong, produced by Shaw Brothers.