After his business goes bust, Ng Shun and his family move back to his old apartment to stay with his father. He has not returned for 10 years because the apartment is too small for his family. Furthermore, the environment is unfamiliar to Shun's family. Coincidentally Shun's old childhood friend, Lung returns too. Due to an old misunderstanding, Shun is distrustful of Lung. Will Lung regain Shun's trust again?

Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.

An assassin called Filthy Harry is hired by a shady figure and charged with killing the heroes. The men are framed twice for different robberies by King Kong's new girlfriend, nearly committed to a mental hospital by their devious boss, and forced to battle Filthy Harry's weaponry-laden robot while covered with time bombs.

The police track down a notorious burglar in order to apprehend him. However, he is given a chance to make up for his ways by working with the police on a case involving stolen diamonds.

Mui Da Hsien (Anita Mui), the eldest sister, is the only breadwinner in the family. She spends all her time in raising up and discipline her three sisters, Yee Hsien (Ann Bridgewater), Sarm Hsien (Charine Chan), and Sai Hsien (Fennie Yuen). They are aware of Da Hsien is becoming a spinster and they are not allowed to get married if Da Hsien remains single. So they decide to find her a husband. So all their boyfriends very anxious to give a helping hand. They find Tsang To Choy (Eric Tsang) who just has broken heart is the right man, but Tsang is scared away by Da Hsien's shrew temper...

The "Five Lucky Stars" attempt to help a restless ghost take revenge on the evil drug gang who took his life. At the same time, they want the ghost to help them get rich and court the four policewomen assigned to the case.