Horrible things move through the shadows of our world--bloodsuckers, Full Bloods and mongrel beasts, shapeshifters and minor freaks. For centuries creature hunters known as Skinners have protected humankind. But who protects the Skinners . . . from madness?
Unbeknownst to the human population, a pestilence is raging through an unseen community of low-level monstrosities. What seems, at first glance, a boon for the mortal cause has horrific connotations--as the Skinner team of Cole Warnecki and Paige Strobel races across the Midwest to uncover the shocking secret of the "Mud Flu." For a nightmare of destruction and blood sacrifice is looming--one born of an unholy meeting nearly two centuries ago--that will pit man against beast, and Skinner against Skinner.