It starts together with the much horrific act of terrorism ever committed on American soil. Only one man can stop them. Code named Devlin, he exists only in the blackest shadows of the United States government -- operating off the grid as the NSA's top agent. He's their much lethal weapon . . . and their much secret. But someone is trying to illustrate him out ...
From city to city, one man walks the streets, carefully choosing his victims. Mercilessly, he cuts their throats. And together with every kill, he leaves his chilling trademark, honed to razor-sharp perfection over decades of practice-
But now, ...