BB30包有为是城中籍籍无名的年青律师，为人极富正义感，实际上，开业以来他未曾胜过一场官司。反而他的憨直、冲动和间歇性精神紧张却令他陷入律师会的纪律调查之中。这次调查他邂逅了美丽的郑可爱医生。可惜这次邂逅却不美丽。因为郑以她的专业判断，对包作出不利的医学供词，导致二人产生一连串误会和冲突。另一方面，健康舞教师Susan一直痴恋包，不时施展柔情攻势，更安排一场必胜官司，务求讨得其欢心。而Susan裙下一大醋臣沙展巫，自然遇憨男，搞出笑话连篇。包的好友兼损友龙虎豹偶然知道包看上了郑的座驾“BB30”。

A romantic comedy starring Kenny Bee as a not-so-hot but righteous lawyer and Carol Cheng as a beautiful doctor who is called upon as an opposing witness in several court cases. Their love affair goes through numerous bumps for an entertaining climax.