《好事成雙》是文藝片聖手導演易文繼愛情喜劇《溫柔鄉》之後，另一齣輕鬆風趣的錯摸愛情小品。「學生情人」林翠和「銀壇靚女」白露明美麗可人，使得傻戇戇的喬宏與田青神魂飄蕩，拜倒石榴裙下。本來兩女芳心暗許，怎料兩男一直搞錯對象追錯女仔，還懵然不知。幸而林翠和白露明不僅外貌養眼，她們的腦袋更不可小覷，撥亂反正，把喬宏和田青手到擒來。本片星光熠熠，除雙生雙旦主演外，還有王萊、蔣光超、劉恩甲、高翔、高原、陳又新、梁醒波等好戲之人合力助陣；特別值得留意飾演白露明弟弟的頑皮小子嚴偉，乃多年後光芒四射之姜大衛是也。

Chen Liujin and Zhang Lihong have a chance encounter with Wang Shu and Li Rong during an outing to the beach. Chen admires Wang, but Wang has fallen for Zhang's charm; Zhang fancies Li, whose heart is set on Chen ironically. The two young men seek to approach their objects of affection on the pretext of inviting the dream date of each other to an outing in the country during which they are teased and made fun of by the two women. To wipe away the shame, Wang and Li plot to intoxicate the women, who pretend to be in a drunken stupor while calling for help from their uncle and father respectively. In front of the elders, Chen declares her love for Wang, and Zhang for Li. Hit with the realisation of the women's sentiments, the two men reciprocate their respective admirers with their well-deserved love.