The official prequel novel to the highly anticipated film.

A long time ago there was the Great War. The reasons for the war have been lost to time. On the shattered surface of the Earth, there is a metropolis that lives amidst the garbage thrown down from the inhabitants of a sky city floating above it. Welcome to Iron City.

A lonely doctor specialising in cyborg repair, Ido, is doing his best to help the citizens of Iron City. But Ido has a double life, another persona born from the pieces of his broken heart.

Hugo, a young man surviving on a life of crime, spots the ultimate steal: an object that will unearth secrets from his own past.

And Vector, the most powerful businessman in the city, has his sights set on a new technology that will change the future of Iron City forever...