Story : Jo Yang Seon (Lee Yoo Bi) whose family had been living the lives of comfort until her father who was once a high-ranking court officer was falsely accused of treason. Having fallen from grace, she has to disguise as a man to sell books at night to scape a living for her family. She encounters Kim Sung Yeol (Lee Jun Ki) coincidentally one day when she was attacked by vampires who are attracted to the sweet scent of her blood and befriends him and his friends thinking that they are a special task force guards against the creatures of the night without realizing that they are vampires as well. The fight between the good and bad vampires becomes more intensified with the appearance of the fallen noble man's daughter whose fragrance blood is the fatal attraction of all vampires.
