According to ancient Jewish legend, there are "36 righteous ones," people who in every generation, unknown even to themselves, continually save the world through their good deeds. What if it were literally true? And what if they were being murdered one by one? Could this explain the existence of what theologians call "radical evil"--the Holocaust and numerous other instances of genocide, the spread of nuclear weapons, the invention of "suicide bombing"? Join the metaphysically minded detective Eric Lonnrot and the traumatized genocide survivor Nahum Applefeld as they race to solve these most urgent questions.