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 chaebol in Korea.

From that moment, Ji Hyo learned the unspoken truth about her original descendent, and the reason that she was being hunted by the wild creatures on the night before her 30th birthday. To protect her from the hunters, Kai brought her back to his dark palace where she met yet another vampire prince known as Mark, an older brother to Kai. With the help from the two good looking vampires, Ji Hyo set out to break an ancient curse that will bring back peace and balance to the dark world. However, there’s a price for every victory.

What sacrifice does she have to make in order to save her life and the future of the dark world? What will happen to Kai and Mark when the curse is broken? What is Ji Hyo's true identity and why was she being hunted? Keep reading this story to find the answers that will resolve the mystery.