A thousand years into the future, an infinite wall divides the world in two and everyone has a warning label written across their collarbone. Avalon Yorke's warning label, Apollyon, means 'the destroyer'. Ava is yet to destroy anything – until her faithful, handmade, robotic companion, Nerezza, destroys the wall.
Feeling indirectly responsible, Ava teams up with hackers and freedom fighters alike to fix what Nerezza ruined. It isn't long before they learn Nerezza wasn't just a robot. Everything begins to spiral out of control; people are dying because of and for her.
Can Ava handle the truth she uncovers? Can she handle being the face of the revolution?