After being sent to Colorado, Samuel Johnson, an agent for Vampires Against The Evil (VATE), never expected to come back to Iowa. But here he is, and something serious is going down. A quick drink of blood is all Samuel has time for before he's right in the middle of the mess.

In a world filled with feral vampires (who act no better than animals) and the Evil Ones (whose hobbies are murder and torture), VATE is there to protect humans, who are too weak and vulnerable to defend themselves. Except that something has changed.

There's a new group of human vampire hunters-and they're unusually effective. Samuel's boss suspects an alien has infiltrated their ranks. There's no other way to explain the group's success. Humans can't kill vampires-it just isn't right.

Samuel goes undercover, joining the hunters as they kill vamps, but before he can expose the alien, the group realizes there is a traitor in their midst. As the investigation continues, Samuel must keep the hunters' attention focused on gangs of ferals and Evil Ones-and off himself.

When the truth is finally uncovered, the fight gets bloody. Winning this one will take everything Samuel's got.