Hidden away in the mountains of Romania by a witch, Iris was only 16 years when she was torn from her human life and made the decision to become a vampire assassin for the Master. She was taught the ways of the vampire and given a magical cloak to fly out into the night and drink the blood of his enemies and control their minds for his benefit. As she learns about the human world and the cruelty of the Master, she begins to fear for her life.