Like everyone else in the world, Mia Bryn lives in the dark. Buried in an underground compound, her life is spent in brief allotments of florescent light and dwindling food supplies. But when a letter arrives, Mia and her father are invited to embark on a journey that no one else has been allowed to take for over a hundred years. They are asked to leave the ground and travel into the air. But the outside world is more surprising and dangerous than Mia could have ever imagined. To survive, she must trust her instincts, learn about a world she knows nothing about, and accept her destiny.