一(yī )对(🕕)孪(luán )(🍅)生兄弟王名成(刘青云)与王利就(周星驰)自小失(shī )散。名成与母相依为命(mìng ),利就则(🔬)为老粗鲁(🥩)辉(梁家仁)收(⏬)养,改名为鲁(♑)细。成是电(diàn )影圈的新(👑)进导演,为人(🕖)精明(👁)有绰头,敢(gǎn )作敢(gǎn )为;细(🐖)则为通天(tiān )经纪,性格爽朗具(jù )正(🚸)义(🖍)感(🚑)。机(🥀)缘巧合下两人相遇并共(🌙)住一(🧚)屋,但却不知(🚨)大家的真正(🔢)身(shēn )份。细钟情于童(🥎)年好(hǎo )友(🗞)方(🙂)嘉楠(🔝)(陈秀(xiù )雯),嘉楠是名成的(🙉)下属(shǔ ),对(duì )名(🈴)成(chéng )心(⛏)仪已(🤷)久(jiǔ ),兄弟两人更闹出一(👺)段纠缠不(bú )清的三(sān )角恋爱。鲁辉认(rèn )(🌮)识(shí )了嘉(jiā )楠的阿姨卓(zhuó )龄,她为人高(gāo )贵具教(jiāo )(🦇)养,与辉分(🐛)属两(liǎng )(⛏)个世界,但龄欣赏他为人老实(shí )忠(zhōng )诚,最后(hòu )与他展(🈺)开了一段(😙)浪(làng )漫恋情。兄弟两人最(👵)后终于相认,但因性(🚲)格各异而(🔙)心存隔膜(🆙)。后名成与友人合伙(huǒ )营商(shāng )(🎐),却被骗而惹上官非,患(huàn )难中细明(míng )(⏺)白到兄(xiōng )弟情(qíng )之珍(zhēn )贵,与众(zhòng )人共施(🍹)计策,营(yíng )(💁)救(jiù )胞兄。