小生（郝劭文饰）父亲有了新欢，他因此受到父亲的冷落，一气之下小生离家出走，小生结识了校工达叔（吴孟达饰）并想办法让他收留了自己，而达叔暗恋一名有眼疾的卖花女（朱茵饰），他假装有钱人天天为她买花，帮她治好眼疾成了达叔最大的目标

为了实现这个想法，达叔和小生去乌龙寺学艺，准备艺成回学校应聘拿到五十万的赏金，学艺归来，达叔果然收拾了那群学生，却因帮助阿武（金城武饰）而让这笔奖金成了泡影，无奈之下，小生带达叔回家偷钱，结果被人发现，小生掩护达叔带钱离开。达叔把钱交给卖花女作为手术费后便到小生家自首，这才知道了小生的身世。

后来，达叔发现卖花女治好了眼疾而且有了男友，尽管卖花女认出了自己，他还是失望地转身离开了，这时，小生出现了，二人紧紧相拥，忘却了生活的苦涩。

Xiaosheng (played by Hao Shaowen)'s father has a new love, so he is neglected by his father. In a fit of anger, Xiaosheng runs away from home, and Xiaosheng gets acquainted with the school worker Dashu (played by Wu Mengda) and tried to get him to take him in, and Uncle Da had a crush on a flower girl (played by Zhu Yin) with eye diseases. He pretended to be rich and bought flowers for her every day, helping her cure her eye disease and became Uncle Da. biggest goal

In order to realize this idea, Uncle Da and Xiaosheng went to Wulong Temple to study art, preparing Yicheng to go back to school to apply for a job and get 500,000 After returning from his studies, Uncle Da took care of the group of students, but because of helping Awu (played by Takeshi Kaneshiro), the bonus was in vain. In desperation, Xiaosheng took Uncle Da home to steal the money, but was arrested It was discovered that Xiaosheng covered Uncle Da and left with money. Uncle Da handed over the money to the flower girl for the operation fee and then surrendered himself to Xiaosheng's home, only then did he know Xiaosheng's life experience.

Later, Uncle Da found out that the flower girl had cured her eye disease and had a boyfriend. Still disappointed, he turned and left. At this moment, Xiaosheng appeared, and the two embraced tightly, forgetting the bitterness of life.