After breaking up with her fiancé, Lee Kang-jae (Kim Seung-su), Han Mi-su (Lee So-yeon) takes on a life of a rebellious night club hopper who frequents nightclubs everyday. She reluctantly attends a party hosted by her father at his construction site and becomes unfortunately linked to Jo Gi-dong. The two      bump into each other often by some twisted fate which worsens their relationship
, eventually turning them into enemies.
 Jo Gi-dong (Kim Ji-hun) is a passionate young man who is trying to make ends meet in the            difficult world. Just once, he borrowed money from dodgy men to fund his fake branded goods business.   Little does he know that it was actually loan sharks who had lent him the money. To make matters worse,   his mother has cancer and Gi-dong must care for his brother, Su-dong.
 Su-dong creates trouble, and make up for his brother’s misdoings, Gi-dong must come up with 50 million (50,000 US dollars) by the end of the week or he must be willing to give up his life. Just when he    thought there was no hope, Gi-dong comes across a classified ad that may just end all of his troubles.        “ Heavily loaded family seeking son-in-law,” the ad reads.
 With nothing to lose and everything to gain, GI-dong replies to the ad. Much to his surprise, he is chosen as the lucky candidate. Is it truly good luck or perhaps it’s bad luck in disguise? As he embarks on an “internship” as son-in-law at the home of Han Jin-tae (Ju Hyeon), what’s shocking is that his new “wife” is Han Mi-su of all people!

由于父亲极力反对只好与以身相许的男友李江宰（金承宇饰演）分手，由此赌气般地开始沉迷于夜店生活的韩美秀（李素妍饰演）。一天，她很不情愿的出席了父亲的建设现场派队，并且与赵基东结成冤家。
一心想在严峻的现实生活中找到一线生存机会，一个热血青年赵基东（金智勋饰演）。为了兜售仿冒皮包而借了一笔钱，没想到那是高利贷。祸不单行，母亲患癌症，他还得照顾智障的哥哥秀东。由于智障哥哥的过错，他要在一周之内还五千万韩元，要不然还会有身命危险。当他走到尽头时侯，突然发现惊天动地的广告 – “巨富公开招上门女婿”。他抱着一线希望去“应征”，结果没想到会被选上。他到韩镇太（朱铉）家开始实习上门女婿课程。他怎么也没想到对方是冤家韩美秀。