Its not the end of the world... or is it? Ever since that fateful day when 99.9% of the world's population was obliterated, there were only two cities left on earth. You would expect that the remnants of humanity to band together to restart and create a new world, but instead the two cities disagree, and war breaks out! Its all-out war; the war seems like it will last forever, until the leaders of one of the cities decide that it would be best to completely wipe the other city from the face of the earth. 

Feel free to change it if you want... (it was kind of loosely based on the horrors of Hiroshima and Nagasaki in WWII).