This place has very little to do with the world as we know it. Vampires Werewolves, Specters and Demons are all real. The world is dark, twisted, brutal and gothic. There are schemes and secrets everywhere. The true powers are those that thrive in the shadows. Surviving is an art and not at all guaranteed, even for Vampires.
The only reason humanity lived this far is numbers. The Vampires try to hide their existence from the world as to not draw undue attention. Attention gets you killed. Hence a council was established a long time ago to uphold the carnival, the thin layer of deception and secrets that keeps the vampires safe. Only some of the many vampire lineages submit to the authority of this council: The Beautiful, The Grotesque, The Highborn, The Mad, The Sorcerers, The Untamed and the Warriors. The rest claim independence. But even they can appreciate the usefulness of the carnival from time to time.
It is best to keep your head down and not be noticed, but when did that ever work for long? Journey into an abyss of afterlife, un-death and blood.