Her whole life was a lie. The ground is safe for all of them. Skyline is the real danger...

Aurelie Bay struggles between the choice to remain on the ground with her new family, or return to the city where she was raised and somehow convince the powers that be that not only is their desperate build upward unnecessary, Skyline is on the brink of destroying itself and those the corporation builds to save.

But when she's confronted by strangers who claim to be grounders but act far too much like skyfolk, who hide an agenda that puts her adopted village at risk, Aure is drawn into a bigger and darker truth that changes everything she knows about her world, her city and the future of humanity.