By the Third Millennium, after a series of short, vicious thermos-nuclear wars between the world's super-powers had left most of the northern hemisphere a desolated radioactive desert, mankind had coalesced into fortress mega-cities in islands of relatively rad-free pockets that existed like random freaks of nature.
But such is the nature of human kind that before many ages had passed the lurid lessons of a brutal history have dimmed, are forgotten and all the bitterness, the greed, the crime, corruption, cruelty, murder and mayhem all erupt like a Biblical pandemic plague.
It is here, where only bravest carry the heavy badge of Justice in Big City there are no innocents.