Only the ruins of vast mega-cities remain of the old world after everything went down the drain… Well several times at that, but who cares? It’s what is left behind that is important - secrets, wealth, knowledge, technologies, food and the occasional pack of mutants. 
There is also Axion, the last of the floating cities, but only the privileged leave there. Only those who have obtained the expensive permits can dive into the locked sectors. Those who cannot afford such a luxury, become Scavengers. 
Dubbed criminals, they are mostly ignored by Axion’s law enforcers. But not Grey. No, Grey is a wanted man, for being the only one who has entered Sector 7 and come out to tell about it. In other words, nothing that out of the usual day to day life of a Scavenger. 
So, who are these Axion teen wannabe Tech-hunters? Why do they want to get in Sector 7? But most important of all, what do they hope to find there?

Cover image done as commission by revismissing.