Yoo Eun Jae ( Lee Si Young) a tomboyish bodyguard went to New York to attend International Bodyguard Conference, but opportunity knock on her door as a female politician asked her to be her personal body guard for three months; but her boyfriend Park Mu Yeol (Lee Dong Wok) was not so happy to hear the news. When Eun Jae came back from New York, Mu-Yeol was so happy that he is finally ready to pop out the big question to her. But unexpected bagged came with Eun Jae that will test their love and life together.