Han Ji-eun (Song Hye-kyo) regards the "Full House" left by her parents as her home and her treasure after her parents passed away. She loves writing and writes online. Without a fixed job, she can only live a frugal life in Full House. Unexpectedly, the simple Ji-eun was framed by her childhood good friend Hu Cheng and his girlfriend, who sold Full House and took away all her money. And this house happened to be sold to the big star Lee Young-jae (Rain). Lee Young-jae wanted to buy this house and proposed to his girlfriend Hye-won, but Hye-won announced that she would marry Young-jae's brother. Young-jae endured the pain, and the reporters who heard the news forced Young-jae to tell the reporters that Han Ji-eun was his fiancée. This caught Han Ji-eun off guard. In response to the request made by Young-jae's manager, Ji-eun decided to fake marry Young-jae and signed a contract in the hope of getting her Full House back. The two then became a pair of happy enemies. The two people with different personalities had a sharp contrast in their living habits. They lived together and there was no day without quarrels. Because Lee Young-jae is a celebrity, their lives were disturbed a lot. Maybe because they had been through a lot together, they fell in love with each other unknowingly...