The drama is a typical melo-drama that depicts the passionate but tragic love of a man named Gang MaRu (played by Song JoongKi). MaRu devotes his whole life to Han JaeHui (played by Park SiYeon), the woman who he loves, but is betrayed by her later and pledges revenge against her. Then MaRu meets another woman, Seo EunGi (played by Moon ChaeWon), who instantly falls in love with MaRu. However, EunGi gets into an accident when she loses her memory after a traumatic brain injury. Now, Maru uses EunGi's lost memory to take a revenge on JaeHui.