一纸戒烟令让狭窄的后巷成为新型社交区域，无数抽数的男男女女不得不躲进那里抽烟。无论身居何位，所为何事，在那里他们都只是一个烟民，大家所做的无非是一起吞云吐雾、一起科插打诨。来自广告公司的志明（余文乐饰）和在化妆品专柜工作的春娇（杨千嬅饰）在那里相识，志明的不幸遭遇以及为春娇点烟的举动让春娇对这个斯文的男人略生好感。在接下来的几个日日夜夜，两人不时的传送短信和相约街角吸烟。感情通过拇指传送，爱情在烟雾之中滋生，最终一条暧昧的短信导致春娇和男友家豪（黄德斌饰）分手。就当春娇准备全身心投入与志明的恋情时，志明的态度却变得含混不清。烟雾继续在街角后巷萦绕，但却不能弥合二人之间出现的隔阂。伴随着增加烟草税的决意颁发，广大烟民们开始搜寻和囤积香烟。在寻烟过程中，志明和春娇在他们第一次遇见的便利商店重逢，这晚，两人相约一起去找烟……本片在五个星期15个拍摄日便完成拍摄，拍摄时间相当短。由于粗口写实镜头过火，《志明和春娇》在香港上映时被定为三级片

A smoking cessation order turned the narrow back alley into a new type of social area, and countless men and women who smoked had to hide there to smoke. No matter where they are and what they do, they are just smokers there, and all they do is smoke and joke together. Zhiming (played by Shawn Yue) from an advertising company and Chunjiao (played by Miriam Yeung) who works in a cosmetics counter met there. Zhiming's misfortune and his act of lighting cigarettes for Chunjiao made Chunjiao feel a little fond of this gentle man. In the next few days and nights, the two sent text messages and met on street corners to smoke from time to time. Emotions are transmitted through thumbs, love breeds in smoke, and finally an ambiguous text message causes Chunjiao to break up with her boyfriend Jiahao (played by Huang Debin). Just when Chun Jiao was ready to devote herself to her relationship with Zhi Ming, Zhi Ming's attitude became confused. The smoke continued to linger in the corner and back alley, but it could not bridge the gap that had developed between the two. Along with the decision to increase tobacco tax, the majority of smokers began to search and hoard cigarettes. In the process of searching for cigarettes, Zhiming and Chunjiao reunited at the convenience store they met for the first time. That night, the two met to find cigarettes together... The film was shot in 5 weeks and 15 shooting days, and the shooting time was quite long. short. "Zhiming and Chunjiao" was rated as a third-level film when it was released in Hong Kong due to excessive foul language and realistic scenes