The Wasteland of the Dead.

The year is 2034, after one last World War, one that took the lives of 70,000,000+ civilians and soldiers, the world achieved eternal peace.
Fortunately, no one used any nuclear ornaments so all of those radioactive balls of death were dropped in designated zones after being deactivated.
But few stayed active.
And after one blew up.
So did the rest.
This destroyed the world, turning it into a desolate wasteland. The few survivors lived in bunkers and such scattered around the world.
These bunkers eventually opened up, allowing those who survived to recreate the world. Though one very complex bunker never opened up. No matter how much anybody tried, it was fully locked down. It became a legend. No one knew what amazing secrets it held.
The year is now 2534. A full 500 hundred years after the nukes risen, the world was beginning it's recover, and this mystery bunker finally began to open up.
And a strange man walked out.