On a stormy night, twin brothers are adopted by the Fat and Thin Kam Lan sisters and separated. Thirty years later, the elder brother, Cheung Yan, inherits his father's business and becomes the lord of Wutian Island, enjoying wealth and power. Influenced by customs, he develops a male-dominant personality. On his wedding day, he takes four wives, with the main wife, Yu Ruyu, being obedient and favored by everyone, just as her mother, Lin Xianghua, taught her.

On her deathbed, Cheung Yan's mother reveals the truth, and he learns that he is separated from his twin brother, Mou Gin Shu. Surprised and delighted, he sends his trusted friend Charles to find him. It turns out that Shu is in Hong Kong and has a family, running a small shoe shop with his friend Chan King Chuen. Shu's wife, Au Ka-Lai, is dominant and career-driven, while Shu himself is a typical "henpecked husband" who willingly submits to his wife's control...

　　故事开始于数十年前，一寡妇临终把一对双胞胎婴儿交托两姊妹，兄长随养母移居南洋一荒岛，改名尚人，而其弟则被带来香港，落地生根，取名毛建树，二人断绝联络。尚人自小生长大富之家，男权至上，却感岛上无甚玩乐，加上其养母临终吐露身世之谜，但为要守孝，不能离岛半步，委派近身查理斯访探其弟下落。原来建树亦已成家立室，其妻欧嘉丽事业心极重，未能如建树所愿生得一儿半女。查理斯找到时，劝他趁机一振夫纲，往南洋与兄会面。兄弟会面，惊喜交集，竟想出调换身份，一试对方的生活习惯，尚人回港，一心要制服嘉丽，引起连番恶斗。而建树遇上千依百顺的人妻尤如丝，对之百般怜爱，可惜竟遭人暗算，而凶手竟是…

投诉

某個雷雨之夜，一對雙胞胎兄弟分別被肥瘦金蘭姊妹領養，從此各散東西。三十年後，長兄尚人(廖偉雄飾)繼承父業，成為烏里丹島督主，享盡榮華富貴，由風俗使然，養成男權至上個性。大婚之日共討四個妻子，正室尤如絲(梁小冰飾)幼承母親林香花(南紅飾)訓示，千依百順，唯天命是從，甚得人寵愛。

尚人母親臨終之際，將真相道出，尚人得悉與雙胞胎弟弟毛建樹(廖偉雄飾)失散，乍驚乍喜，派親信查理斯(陳嘉輝飾)千里訪尋。原來建樹身在香港已成家立室，並與友人陳敬全(羅浩楷飾)合資經營小型鞋店，樹妻歐嘉麗(朱慧珊飾)專橫霸道，事業心重，而建樹亦樂於受愛妻管束，典型小男人一名。

兄弟重逢，恍如隔世，二人互相欣羨對方生活的新奇多姿，忽發奇想，互調身份，尚人更欲趁機代建樹懲治惡妻。正當尚人抵港與嘉麗互相鬥法之際，竟傳來建樹撞機身亡噩耗，並疑被謀財害命。尚人為免招致殺身之禍，只得繼續隱瞞身份。

某個雷雨之夜，一對雙胞胎兄弟分別被肥瘦金蘭姊妹領養，從此各散東西。三十年後，長兄尚人(廖偉雄飾)繼承父業，成為烏里丹島督主，享盡榮華富貴，由風俗使然，養成男權至上個性。大婚之日共討四個妻子，正室尤如絲(梁小冰飾)幼承母親林香花(南紅飾)訓示，千依百順，唯天命是從，甚得人寵愛。

尚人母親臨終之際，將真相道出，尚人得悉與雙胞胎弟弟毛建樹(廖偉雄飾)失散，乍驚乍喜，派親信查理斯(陳嘉輝飾)千里訪尋。原來建樹身在香港已成家立室，並與友人陳敬全(羅浩楷飾)合資經營小型鞋店，樹妻歐嘉麗(朱慧珊飾)專橫霸道，事業心重，而建樹亦樂於受愛妻管束，典型小男人一名。

兄弟重逢，恍如隔世，二人互相欣羨對方生活的新奇多姿，忽發奇想，互調身份，尚人更欲趁機代建樹懲治惡妻。正當尚人抵港與嘉麗互相鬥法之際，竟傳來建樹撞機身亡噩耗，並疑被謀財害命。尚人為免招致殺身之禍，只得繼續隱瞞身份。