A Vampire Detective? No. A Vampire Slayer. 

In a world where vampires reign supreme, blood is the most valuable commodity. But decades of overconsumption has driven prices up and quality down. Slayer, however, has a more important issue at hand, namely the inexplicable and violent deaths of multiple citizens. Dispatched by Cooperate to solve the crimes quickly, Slayer soon finds herself caught up in a world of rouge vampires, cutthroat politics and a secret no one at the top is willing to acknowledge.