The streets are a battleground for humans, vampires, and demons alike--where survival is a skill, love is a weapon, and the most dangerous act is to care for another . . .   Keir is an assassin devoted to Lady Arianne, the last of her royal bloodline. He is sworn to protect her, and that means eliminating any threat to her life. But while on a mission, he is set upon by a pack of demons, barely escaping with his life.   Cleopatra lives by a set of rules so rigid she no longer knows her true self. But her kind and loving nature resurfaces when she finds a man, bloodied and dying. Moved to help him, she risks her future and her life to save a stranger far below her aristocratic station.   Their attraction to each other is as powerful as it is forbidden. But even as their love grows, Keir keeps his true identity a secret--and this lie is not the only threat to their love . . . or their lives.