Spoiler synopsis.
Unaware of an imposed virtual reality, our main character is jolted out of sync with it, by a car accident, and begins to see what he believes are images of a horrible post-apocalyptic society around him. He runs into a woman who eventually believes him, and they run off from the organizations out to get them back in line.
After a series of adventures, they find the source of the VR signal, and without remorse, sort of accidentally cause the death of the man keeping the machinery going.
They then see the real world for all of its plain cardboard boxian distopia rather than the previously viewed horrors, and waltz off into the proverbial sunset on the apparently barren wasteland on which is placed this town of boxes and signage.
I can imagine them eventually wishing they hadn't destroyed the VR machine.