We had no time to prepare.
It was as if the very earth we had always taken for granted turned against us. 
The surface burned, air became toxic to breath, and deadly radiation bathed the planet day and night. 
In the year 3124 Humanity is now held up under ground in massive bunkers named Under Cities

 With the surface completely uninhabitable only those who are forced or desperate dare to make trips to the surface hoping to scrounge up what little was left of the old Humanity to sell off as scrap.

[Cover Made With AI]
[May Contain Subjects and other things readers may find uncomfortable]

Underdark