出生在一个单亲家庭的华弟，从小都没有见过他的父亲，他是在庙街散养长大的在很小的时候，他没有读过书并且与街上的混混们一起玩耍不务正业，与自己的母亲相依为命。别看他整天跟混混们一起打打闹闹但是他是一个十分孝顺的孩子并且有强烈的义气感和同情心。自己的兄弟很会惹麻烦，每次都是华弟帮助解决的。在他这样的真性情的影响下有很多小混混都跟着他一起混。女主角却是一个上海的富商会的女儿，她是一个十分淑女的孩子，但是她的母亲自小与父亲离婚了，她到香港来寻找母亲结果遇到了小混混华弟，出于叛逆心的她觉得华弟十分的粗鲁但是却又十分喜欢他，想和他在一起玩耍。他们住在同一个屋檐下时常搞起来恶作剧，吓唬对方，由于女儿的失踪而报警的女主角的父亲他认为华弟是一个小混混，对他的女儿心怀不轨…

Hua Di was born in a single-parent family. He never met his father when he was young. When he was young, he didn't study and played with the gangsters on the street without doing a job, and depended on his mother for life. Don't look at him fighting with gangsters all day long, but he is a very filial child with a strong sense of loyalty and compassion. My brother is very good at getting into trouble, and Huadi helps solve it every time. Under the influence of his true temperament, many punks followed him. The heroine is the daughter of a rich business association in Shanghai. She is a very ladylike child, but her mother divorced her father since she was a child. She came to Hong Kong to find her mother and met a gangster Huadi. Out of rebellious heart She thought Huadi was very rude but liked him very much and wanted to play with him. They live under the same roof and often play pranks and scare each other. The heroine's father who called the police because of his daughter's disappearance thinks that Huadi is a gangster who has evil intentions towards his daughter..