Rudi MacKenzie continues his trek across the land that was once the United States of America. His destination: Nantucket, where he hopes to learn the truth behind the Change that rendered technology across the globe inoperable. During his travels, Rudi forges ties with new allies in the continuing war against the Prophet, who teaches his followers that God has punished humanity by destroying technological civilization. And one fanatical officer in the Sword of the Prophet has been dispatched on a mission: to stop Rudi from reaching his destination by any means necessary.