Covenant of Blood

How many were there? Enough. Over the centuries they had evolved to satisfy their needs with a more passive source of the nutrients they required; after all, blood was blood. But not for all. Some could not resist the ancient urge to satisfy their blood lust with the warm, flowing liquid of a living being. In those instances, errant members of the Network were tracked by the death squad known as the Shield, from whom there was no escape.