Chow Mei-Wan
The agile and cerebral fighter Kong Yin is invited to join the police SWAT team. Kong is soon sent on an undercover mission to investigate the gang operating at the Happiness Rubber Plant to coerce female workers into prostitution. An indignant Kong joins hands with fellow worker Chow Mei-ha and factory head Wong Chi-kong to expel Blackie Kei whose ruthless and blatant exploitation of the workers has been going unpunished. Facing the loss of a lucrative source of income, Blackie and his underworld bigwig boss Wu Tin-hung intercept the love letters exchanged between Wong and the wife of the general manager Ting Yuk-lan and use the correspondence to extort money from the adulterers. The fearless Chow dons a maid disguise and ingratiates herself with the gangster, followed by a police raid masterminded by Kong to crack down on the notorious gang.
Curious bar guest
Working as a telephone operator on the nightshift, David Lau received some calls from a woman for a David and agrees to a blind date. Wearing a violet on his lapel, David mistakes someone else for his date. Jennie Lee, a stranger, comes calling at the hotel, addressing a bewildered David with an intimacy that is familiar and awkward. Mok Yu-fuk, the self-proclaimed Sherlock Holmes, follows Jennie but gets robbed. Lau received an invitation to Jennie's birthday party. The guests acting strange at the party. Jennie and Lau take a stroll along the beach. Jennie suddenly hurls herself into the sea in a run. Five years ago, when Jennie was having a heart-to-heart talk with her fiance David Wong on the beach, her neglected brother ran off to the sea and drowned himself. Suffering from a nervous breakdown ever since, Jennie was devasted by the departure of her fiance to America. The hopes Jennie's parents are pinning on the new David to boost their daughter's recovery are merely wishes.
Gambler
Mona Lam, who works for a swindling syndicate under duress, scours a nightclub for her new prey and finds the rich heir Cheng Siu-chuen. Struggling to find true bliss, the lovers gain the blessing of Lam's second uncle. On the eve of Cheng's father's birthday banquet, Lam is pressured to strike again under the watchful eye of Lucy sent by the man who's pulling the strings on the marionette behind the scenes who has threatened to kill Cheng. The quick-witted woman aborts the operation, claiming to have spotted her previous victims from amongst the guests. Her confession gains Cheng's understanding, but not his father's. The ringleader brings the liaison to an end by blackmailing the father and putting Lam under house arrest. Helping the girl flee, Second Uncle is killed in the commotion. The police act on the father's tip-off and bust the gang, clearing the way for the lovers to tie the knot.
The Diary of a Husband serves as an illustration for the arrival of the white-collar economy, in which the extended family is replaced by the smaller nuclear family. It is a story about four pals who work at the same office, which, like other white-collar workplaces, has become the men's primary site of life, where livings are made and friendships fostered. Meanwhile, their wives have fostered something of their own—a brigade to catch cheating husbands. Much comedy is then generated by the cat-and-mouse game between the men and the women...The battle line drawn here between the sexes remains for years, to the extent that this very same story has been retold many times in Hong Kong films, including Men Suddenly in Black, the 2003 Pang Ho-cheung film with a similar Chinese title.
Lam Fei-Fei, Lei's mistress
Hong Kong was quickly becoming industrialised in the 1960s. The market was hungry for female labourers with a grasp of crafting skills. In addition to being wives and mothers, many women entered the labour market at that time. This ‘streamlined comedy' (as it was advertised) is called Three Love Affairs, but the main action is centred on the lovers played by Ting Ying and Cheung Yee. In order to make themselves more appealing, the factory girl pretends to be the daughter of a successful businessman, while the chauffeur pretends to be from a wealthy family. Their relationship is fraught with worry and anxiety, because they are confused about their own identities, and have not yet come to terms with themselves and their lives. With the support of the Manufacturers' Association, the film was shot on location at an actual factory, evidencing a prosperous period in Hong Kong's industrial history.
Ah Chiu
Cheung framed Chan For. Chan orders his wife not to tell this to their children, Ah Lan and Hung. His wife passes away. On her deathbed, she asked a neighbour, To Chung-man, to take care of her children. Claiming to be a good friend of their father, Chan For moves in to the bed next to Ah Lan to take care of his children. Hung likes this uncle because he always treats him generously. But Ah Lan finds "Uncle For" weird and enthusiastic. Ah Lan is forced to pay her mother's debt. Hung is suffering from acute appendicitis. To solve Ah Lan's financial problem, Chung-man returns to his rich family and accept an arranged marriage. Ah Lan decides to sell herself to the construction site foreman for one night. Chan For wants to stop his daughter from making this deal, so he agrees to work for Cheung again. The next day he carries out a robbery and is caught. Ah Lan and Chung-man visit him in jail, and hold their wedding ceremony in front of him. He looks forward to the days when he returns.