 Rain plays Bok Ku, an orphan who has sworn to spend the rest of his life with his childhood friend Han Da Jung (Kim Sa Rang), to repay her for saving his life many years previously. However, much against his will Bok Ku falls in love with his own brother s ex-girlfriend. Her name is Cha Eun Suk (Shin Min Ah) and is a famous actress. Bok Ku secretly blames her for his brother s accident that has now left him in a coma. He wrongly believes that she betrayed him and swears revenge. Bok Ku gets a job working as her bodyguard so that he can be close by, and inadvertently falls for her.