方世玉（李连杰饰）原是城中纨绔子弟，好打抱不平。一日，他闻说外省富豪雷老虎在次设下擂台，比武招亲，又听讲雷小姐貌美如花，遂前往比武招亲。当方世玉过赢准备打赢未来岳母李小环时，一阵风吹过，将台上坐着的小姐的盖头吹了起来，他发现竟是一名丑女时，马上故意认输，溜之大吉。方世玉的母亲苗翠花（萧芳芳饰）听说儿子擂台上败下阵，自觉颜面无光，于是化身方世玉的哥哥方大玉前往打擂，一举打败了李小环。岂料雷老虎当晚即派人来接方大玉成亲。世玉为救母亲，只有代替母亲前往雷家成亲。母子两计划新婚之后趁回门的时候一起出逃，岂料方世玉的父亲方德回来了

Fang Shiyu (played by Jet Li) was originally a dude in the city, and he liked to fight injustice. One day, he heard that Lei Huhu, a rich man from other provinces, set up a competition for the next time to recruit relatives. He also heard that Miss Lei was as beautiful as a flower, so he went to the competition to recruit relatives. When Fang Shiyu was about to win against his future mother-in-law Li Xiaohuan, a gust of wind blew up the hijab of the lady sitting on the stage. When he found out that she was an ugly girl, he immediately gave up on purpose and slipped away. Fang Shiyu's mother Miao Cuihua (played by Xiao Fangfang) heard that her son was defeated in the ring, and felt that her face was shameless, so she turned into Fang Shiyu's brother Fang Dayu and went to the ring to defeat Li Xiaohuan in one fell swoop. Unexpectedly, Leihuo sent someone to pick up Fang Dayu and marry him that night. In order to save his mother, Shi Yu had to go to Lei's house to get married instead of her mother. The mother and son plan to escape together when they return home after their wedding. Unexpectedly, Fang Shiyu's father Fang De has returned.