They live among us in the shadows: a species unknown to man except in legend. Highly intelligent, with the ability to adapt their flesh to new forms, they are capable of great destruction and ruthless behavior but desire only to live in peace. In New York City, a rogue member of their underground society threatens to reveal their existence to mankind, which will provoke a terrifying war unlike any seen before. Anthony Mace, the heroic captain of an NYPD homicide unit, is a media darling because of his successful record in apprehending serial killers. But Mace faces the case of his career—a case no one else wants to touch—when a series of vicious and bloody murders sends the city reeling in panic. His only clue is a historic artifact discovered at one of the crime scenes: the hilt of a sword with a broken silver blade, bearing the likeness of a pious Inquisitor . . . and an angry wolf. Each horrifying murder leads Mace closer to an impossible truth that his superiors refuse to consider. In the midst of a national media firestorm, Mace must risk his career—and his very life—to stop this supernatural horror.