Have you ever gotten sick from getting a flu shot? Have you ever turned into a werewolf from a getting a flu shot? How did that make you feel? When a prominent pharmaceutical company releases its newest strain of the flu vaccine to the public, all hell breaks loose, literally. A gnarly side effect turns those who receive the vaccine into werewolves, and only a small population of vampires, known as The Endangered, are capable of fighting against the ever-growing werewolf population. When all is said and done, secrets will be exposed, alliances formed, and blood spilled as The Endangered do everything in their power to preserve their own kind and their food supply.