广东省中山县的一方富豪葛大富和损友王八见面就吵架，他们的吵闹基因不仅影响到各自经营的武馆精武社和武圣堂，也遗传给了他们的儿子葛长寿（曾志伟 饰）和王明星（倪星 饰）。长寿、阿星同时喜欢青梅竹马的女孩秀秀（黄秀玲 饰），阿星仪表堂堂，与秀秀互生爱慕，反之长寿则形容猥琐，骄横散漫，丝毫不得秀秀的喜爱。 话说长寿刚出生之时，一眉道长（林正英 饰）曾算定他寿年不过二十三，月圆之夜定是索命之时。在一个满月时分，长寿和两个狐朋狗友偷窥秀秀洗澡，结果心神不定跌落屋顶，吓死了秀秀，他反借秀秀一口阳气度过难关。而秀秀则变成不穿衣服的羞羞鬼……

　　廣東省中山縣的一方富豪葛大富和損友王八見面就吵架，他們的吵鬧基因不僅影響到各自經營的武館精武社和武聖堂，也遺傳給了他們的兒子葛長壽（曾志偉飾）和王明星（倪星飾）。長壽、阿星同時喜歡青梅竹馬的女孩秀秀（黃秀玲飾），阿星儀表堂堂，與秀秀互生愛慕，反之長壽則形容猥瑣，驕橫散漫，絲毫不得秀秀的喜愛。

　　話說長壽剛出生之時，一眉道長（林正英飾）曾算定他壽年不過二十三，月圓之夜定是索命之時。在一個滿月時分，長壽和兩個狐朋狗友偷窺秀秀洗澡，結果心神不定跌落屋頂，嚇死了秀秀，他反借秀秀一口陽氣度過難關。而秀秀則變成不穿衣服的羞羞鬼……

Two feuding families brag about their sons on christening day. One, called Long-life, is destined to die early, while Sing, the other, will do well. Twenty years pass. Long-life has survived, and he fancies pretty Hsio. In a scene stolen from My Life As A Dog, he spies on her in the shower, falls through the roof, kisses her as he lands..... but then her spirit leaves her body. Having died naked, Hsio wanders around sans clothing, and is dubbed the Shy Ghost by other spirits she meets. What follows mainly concerns her family and friend's efforts to lay her spirit to rest. These include taking revenge on Long-Life, getting some clothes to her, stacks of fu fighting, incantations and a duel between a buddhist and a taoist.