Fifty years later (in the year 2058), Jon twisted and turned. As always, he had a hard time sleeping.
"Hey," a man whispered, while shaking Jon. "Wake up."
Jon woke up and saw what he always saw: darkness.
Off in the distance, he heard an explosion.
"Sorry, I must have nodded off."
"Well, don't do it again. I need you on your feet."
Another man walked towards them. "The path's clear. Come on."
This was it. Jon had finally made it back to his hometown in Ohio. The one he left years ago. Of course, if anyone was still there from that time they'd get a shock from seeing Jon, who doesn't look any older than a teenager. But, as far as he knew, everyone had left to get to the safety zones.
When Jon imagined the future, he thought it would be a paradise with flying cars and futuristic devices. But that was just wishful thinking. The future was a warzone, and because of Jon's wish to be immortal, he would have to endure it all.
And speaking of wishes, Jon lost the wishing stone shortly after the war started. Which is obvious, of course, because if he had the stone, he'd wish the war away, or something to that effect. He tried to find it, but couldn't.
Besides the fact that he couldn't die (which he didn't tell anyone), he couldn't do anything about the war any more than anyone else. Or so he thought.