An Apocalyptic Dream

I had a dream where most of the people on Earth had mysteriously vanished or died. A bunch of survivors and I had taken refuge at an abandoned theme park/resort where there was nothing to eat but Chick-fil-A. A five-year-old orphan girl, who was also a mathematics prodigy, adopted me as her guardian and told me about an evil kidnapper from whom she had escaped, and who would stop at nothing to find her. I figured he was probably dead like most of the rest of the world, but then she pointed him out on TV. He was a sheriff, and he and his well-armed posse (now a post-apocalyptic band of marauders) were now headed for our theme park....