Seventeen-year-old Elle Winters gave up everything for one shot at saving her closest friend. But though she may have escaped the ARC and found her way to the surface, Elle is no closer to finding Sebastian and stranded in a world where she doesn't belong. This new society with its extraordinary inhabitants seems perfect, but is it more deadly than the one she left behind? Secrets and lies lurk just below Hope City's shiny exterior and it's impossible to tell what is real and who can be trusted. Will Elle be able to uncover the truth and find Sebastian, or has she already made a fatal mistake?