Gripping. An epic struggle. — Jack McDevitt, Nebula Award-winning author of Firebird After surviving the machine plague and the world war that followed, nanotech researcher Ruth Goldman and former Army Ranger Cam Najarro have finally found peace in a village hidden in the Rockies. But the arms race for weaponized nanotech has continued. America is struck by a new contagion. Together with a small band of friends and rivals, Ruth and Cam must discover the source of the new plague — never suspecting that its creator is an old enemy they believe dead…