Scavengers

backstory
after many years, many wars, humanity has abandoned there home planet in search of a new life... but there are very few of humans left on earth, but that's not all that's left...   radiation from distance stars has finally made there way to earth...   forcing whats left of humanity down to the depths of the earth, where they thrive, only very few travel to the surface and return living...   but that will change very soon...