But Bell has never had a challenge like this one. From Arizona to Colorado to the streets of San Francisco during its calamitous earthquake and fire, he pursues what is quickly becoming clear to him is the sharpest criminal mind he has ever encountered, and the woman who seems to hold the key to the bandit's identity. Using science, deduction, and intuition, Bell repeatedly draws near only to grasp at thin air, but at least he knows his pursuit is having an effect. Because his quarry is getting angry now, and has turned the chase back on him. The hunter has become the hunted. And soon it will take all of Isaac Bell's skills not merely to prevail . . . but to survive.