Wan-Soo (Kim Ha-Neul) reached the top of her sport as a golf player. Dreaming of having a perfect life within the upper class, she marries the successor of the Hwain Group. Now, Wan-Soo works as the chairperson for a foundation and has gained worldwide fame through her charity work. She has Do-Yoon (Rain) as her new bodyguard. Do-Yoon, who graduated from the police university, excels in the martial arts. He joined the Hwang Group's security team for a specific reason. Through her bodyguard, Wan-Soo faces a secret of the Hwain Family.