Production company Taoyuan chose for its inaugural film a comedy and Fong Yim-fun gets to take a break from playing long-suffering roles and showcase her talents in making us laugh! She plays the spritely titled character, brandishing a fresh image. The film is an adaptation of the literary classic Romance of the Western Chamber, in which the Prime Minister's daughter (Law Yim-hing), under siege from rebel soldiers, is rescued by a plan formulated by a poor scholar (Law Kim-long), with whom she is in love. But her mother (Poon Yat On) reneges afterwards on her promise to let the rescuer marry the daughter, and the clever Red Maid steps up as go-between, devising a series of sharp-witted tactics to help the lovers.

On his way to Lin'an, Lee Tsi-wan survives an attempt on his life by an employee but loses his memory. Maid Siu Yuet-mui of the Sek family comes to the help of the distressed. Lady Sek marries Siu to Lee to vanquish her husband's licentious interest in the maid. The loving couple raises a daughter Siu-fa. A few years later, Wan is hit on the head away at work and regains his memory. The homesick traveller returns to his native home, leaving behind Siu and daughter. The mother and daughter look for the missing man but he hasn't the faintest idea who they are. Apprehended by the incident, Siu plunges into depression. One day, Lee passes by the stone house where the couple used to live in and recalls past episodes of his marriage. The family is happily reunited.

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.