本片具有极大的讽刺意味。底层劳动人民沙甸鱼（黄子华 饰）为人老实，是一家超市的职员。兢兢业业的工作并没有令沙甸鱼赢得大家的肯定，反而经常受到取笑。沙甸鱼一直都是租房居住，最近更被业主贝太（潘芳芳 饰）逼迁，加上女友一直逼他买房结婚，然而微薄的工资却始终不够，沙甸鱼好不烦恼。一个晚上，贝太与女儿Anna（温碧霞 饰）吵架后来到沙甸鱼家，想找他出气，岂料最后竟然酗酒加服药猝死沙甸鱼家中。本来就已经烦恼缠身的沙甸鱼，这下更惹上了大麻烦，渐渐越陷越深……Mr. Sardine, a klutz who is so spastic that he's barely able to manage his supermarket job, is being pressured into marriage; although a number of haphazard events seem to be pushing his life in other directions.
