Famous novelist Ngan (Michael Hui) is leading a comfortable life living on the royalties of his published novels. He has now placed all his attention onto his daughter Sophia (Miriam Yeung). Sophia has reached a suitable age for marriage and is still searching for her Prince Charming. She has a crush on Frankie (Lau Ching Wan), her boss and a playboy. Due to some accident, Frankie decides to stay at Sophia's home for a while, Then, Sophia and Frankie became lovers and are planning to get married! Ngan Loves his daughter so much that he knows he must destroy their love before it is too late. Sophia must make a life and death decision between Frankie and her father...

龙雁飞（许冠文 饰）是一个著名的武侠小说家，十年了都没有新的作品面世了，不过以往的畅销作品仍然带给他客观的收入，生活无忧。他的女儿Sophia（杨千嬅 饰）是个早已到了适婚年龄，但她恋爱运甚差，只想找一个真正可以过日子的人结婚，其实她一直暗恋自己的上司——花花公子Frankie（刘青云 饰）。Frankie因为意外要搬到Sophia的家住，龙雁飞看见自己心爱的女儿被Frankie当工人使唤，心里很不是滋味，便对Frankie充满了敌意，但在后来的相处中，两个男人又成了知己…

喜劇王、マイケル・ホイ主演の「Mr．BOO」シリーズ最新作。スランプ中の有名小説家・フェイは、娘・ソフィの恋の相手がプレイボーイであることを気に病んでいた。次第に急接近し、結婚の約束までしたソフィと恋人の仲を引き裂こうとする彼だったが…。