A lone girl - Kirit Densira - set her City upside down and fomented a massive rebellion. Since then, months have passed and everything has fallen to pieces.

With the Towers in disarray, without a governing body or any defence against the dangers lurking in the clouds, daily life is full of terror and strife. Nat, Kirit’s wing-brother, sets out to be a hero in his own way - sitting on the new Council to cast votes protecting Tower-born, and exploring lower tiers to find more materials to repair the struggling City.

But what he finds down-tier is more secrets - and now Nat will have to decide who to trust, and how to trust himself without losing those he holds most dear, before a dangerous myth raises a surprisingly realistic threat to the crippled City.