在新开通的地下铁中，青年陈保罗（张国荣 饰）对同车的莫妮卡（张曼玉 饰）一见钟情，不幸却被另一名乘客安妮（梅艳芳 饰）趁机捉弄。这几位年轻人很快散落在茫茫人海中，职场新丁陈保罗开始为工作奔忙，莫妮卡则为了厘清和上司的一段旧情而心神不宁。某日，保罗与莫妮卡再次相遇，而富家小姐安妮亦再度出现，半捉弄半挑逗地缠上了保罗。莫妮卡找到新工作，遭遇了好色新领导的骚扰，保罗则在安妮的暗中帮衬下正式追求莫妮卡，与后者的好色上司连番交手。莫妮卡考虑接受保罗的爱意但终于退缩，声称将他们的爱情交付给一场地铁中的缘分游戏。在离乱的人流中，保罗和安妮一起，去找寻消失的莫妮卡……
艾丽莎十几岁时与虐待狂史蒂文有过一段恋情，并生下了他的孩子，但后来送人领养。多年后，他们的女儿找到了他们，史蒂文操纵她与她发生婚外情，忽视了他的家人。
Nikolaï was abandoned at birth and has been in foster care ever since. Although a family would like to give the sixteen-year-old boy a home, he decides to make one himself. He meets Camille, an intriguing fifteen-year-old wiseacre, and tries to convince her to make a child together. Nikolaï is convinced that he can handle any problem and wants to avoid at all costs that an adult thwarts his plans. Camille and Nikolaï flee together from the home and isolate themselves in the woods. In the heart of this gloomy, mysterious forest, Nikolaï will have to face his first feelings and learn to become a man. Soon, he feels that there are many things he cannot control.
