Professor Elijah James Moriarty built an empire by understanding something most criminals never could: controlling information is more powerful than controlling people.

Years after his disappearance, a string of meticulously orchestrated murders announces the return of a mind Chicago once feared. But the methods are familiar for all the wrong reasons.

Someone has resurrected a weapon Moriarty believed was buried—a system capable of turning evidence into deception, allies into enemies, and the truth into whatever its creator chooses.

And somewhere inside the machinery of his former empire, a woman who knows him better than anyone has begun a dangerous game.

For the first time in his life, Moriarty may be facing an opponent who understands not only how he thinks—but how to make him question everything he knows.