呆佬的岳父是名地主，有财有势，却吝啬成性。他的三名女婿中除呆佬靠种田维生外，其余两个都是商人，而且身家丰厚。呆佬心肠正直，又不懂繁文缛节，每每到处碰壁，被人饥笑为呆头呆脑。一日，岳父做寿，两个营商的女婿衣冠楚楚前来恭贺，惟呆佬一人手抱肥鹅，赤足而至，且又把生辰、死忌混淆，惹来连串笑话。

Third Sister Tai marries Dunce Lau and her life has since been between laughter and tears. At the birthday party of Tai's father one year later, Lau's wit suddenly comes back to him. Lau turns the occasion into a stage for displaying his talents and makes fun of his two brothers-in-law who used to despise him.