Alaska in the year 2314: Seventeen-year-old Nahanni Redfern and her people—descendants of First Nation tribes—have been living in a vast system of secret underground caves, hiding from the totalitarian government on the surface that would enslave them. Then one night, an explosion shakes their world, and Jack Correll, an enigmatic young physicist from the surface, discovers them. To everyone in underground Tanháia, discovery means only one thing: their years of secrecy have ended, and they are now facing capture or death. Can their secrecy be maintained? Will Correll betray them, and what are his real reasons for coming? Nahanni is about to learn that appearances are deceptive, motives complex, and where people are concerned, no one knows what goes on below the surface.