As the raming band of survivors seek desperately to escape the eerie wastes and mutated life-forms of their nuclear hell, they emerge from a gateway back into the ruins of Manhattan the concrete battlefield where Ryan had avanged the death of his father and older brother.

The city is a flooded hellzone ruled by street gangs adn hordes of reptilian mutants who inhabit the sewers. Under this urban ruin lives the self-styled King of the Underground, presiding over his subterranean fortress filled with prenuke memorabilia. And here, in this once great metropolis, lives a ten-year-old boy. He is Ryan Cawdor's son...

The children shall inherit the Earth.