Cheung Yan-Lai, framed by his elder brother Cheung Yan-Tsuen, is sent to jail. He manages to escape and plans to take revenge along with a sorcerer, who uses orangutan blood to turn the Yellow Hair Monster into a lethal weapon.
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.
The three heroines, Wong Ang, Wu Nga, and Heung At expose a murder case involving three dead bodies found in an old temple. Unbeknown to the trio, they've fallen in a trap laid by gangster Hui Pui-shing, who desires to avenge his brother's death by eliminating the women. With the cooperation of Hui's righteous subordinate, the police arrest Hui for smuggling tobacco and seizes their forged banknotes.
Chan Siu-hung is forced to become a prostitute, with the police following hot on her heels. Ching Chi-ko comes to her defence by claiming to be her husband. Chan is put up at Ching's roof hut named the 'Seventh Heaven' and the two gradually fall in love. Soon the war breaks out. Ching is drafted to do hard labour by the Japanese army. When the war is over, the crippled Ching returns and lies to Chan that he is already a married man, hoping to persvade Chan to marry someone else. Nonetheless, Chan's devotion overwhelms Ching.
Reporter Yu Mong-yuen is recovering from a leg injury in his fiancee Man-wah's apartment. Bored, he looks out the rear window and observes the life of the neighbouring building. Among the tenants are a sugar-daddy and his mistress, a middle-aged man wants to marry a young girl, but she is in love with his son. Finally, she hatches a plot and makes the man agree to her marrying his son ; a sly fortune-teller ; a lively gym, a rich widow quarrels with the trainer of a gymnasium because his dog has bitten her cat ; and an opera school, a woman signs, leaning on the balcony, and a man tries to strangle her. In fact they are rehearsing an opera…… One evening, Wah is on the night shift, and Yuen watches the opera troupe rehearse to the end. Under the influence of drugs, Yu mistakenly believes that a divorced man has murdered a taxi dancer. He alerts the police, but the whole thing is nothing more than a misunderstanding.
Rascal To Chai-yan brings a false charge of selling fake medicine against doctor Fan Tin-sang, who is sentented to a twenty-year imprisonment. Fan makes an escape after a decade, and secretly provides for the education of his son Fuk-kwan brought up by a poor blacksmith. Fuk-kwan grows up to be a doctor practising in the country. To again does harm to Fuk-kwan, only this time Fan intervenes. Both he and To die in the fight.
The sophistication of 1950s Hong Kong cinema is vividly illustrated in this film of limited budget and resources. Cantonese opera star Sun Ma Si-tsang plays a country boy who looks exactly like Sun Ma and is asked by a rich girl to impersonate the star, to help her stage an opera. The self-reflexive humour generated by the absurd situation not only provides delicious parody of celebrity culture but also comments subtly on class inequality and the perils of urbanisation. Sun Ma, who also appears as himself in a stage performance, is complemented beautifully by the brilliant comedian Yee Chau-shui as his sidekick and Hung Sin Nui, another opera superstar, as the spoiled and precocious rich girl.