She seems to be an ordinary woman, who worked as a waitress at a local coffee shop in the city of Seoul. One night, a strange young man walked into the shop and introduced himself as Kai, the Prince of Blood. He warned Ji Hyo that her life is in danger, but she thought it was all a lie until a group of wild creatures attacked her on her way home during the full moon. Fortunately she was saved by Kai, who turned out to be a 200 years old vampire disguised as an heir to one of the most powerful