芳芳(张柏芝)婴孩时被弃置在百货公司内,长大后的她成了“购物狂”,到处搜罗新款名牌,一买便停不下来,搅到经济陷于困境又连番失业。痛定思过她决定看精神科医生,而这个医生简仁(刘青云)却患有“选择恐惧症”。一日,刚巧简仁医生的护士早产,芳芳协助接生,因而接替护士工作。其后,芳芳遇上一个同样有购物狂症状的穷富(陈小春),但穷富是个吝啬富豪,生性孤寒嫌医药费贵,芳芳为此充当医生教穷富治疗。后来,简仁、芳芳、穷富、简仁的前度女友叮当 Fang Fang (Cecilia Cheung) baby was abandoned in the department store, grew up after she became a “shopaholic”, collecting new brand names everywhere, will not stop a buy, stir into the economy in trouble and after another jobless. Contempt she thought she decided to see a psychiatrist, and the doctor Jennifer (Lau Ching Wan) suffered from “phobia.” One day, a nurse who happened to be a medical doctor was prematurely born and Fang Fang assisted in the delivery of the new job, thus taking over the job of a nurse. Thereafter, Fang-Fang met a rich and poor (Chen Xiaochun), who also had shopping-like symptoms. However, rich and poor are a mean and wealthy adult. They are extremely expensive and Fang Fang serves as a doctor to teach the poor and the rich. Later, Jane Ren, Fang Fang, Fu Fu, Jane Ren's former girlfriend Jingle