This is another one I watched this one quite a while ago, so take this with a grain of salt.
This show was pretty different. It took place in in the U.S. after a "wind" blew through the world erasing everyone's memory, thus reverting them back to their most basic instincts. A man named Wataru however, is able to recover some sense of civility with the help of a series of people who were somehow able to withstand the amnesia wind's efects. So he travels the country in order to find out just what the heck is going on.
I'm not sure why this took place in the U.S. Maybe that's supposed to mean something thematically. Or maybe it's just some kind of plot device. Who knows?
The show seemed kind of random at times, and almost felt like something that used to be a TV or OVA series that was strung together into a movie. It was just Wataru going from place to place and finding out how crappy people can be when they loose the civility that had been conditioned in them from birth.
The ending doesn't really explain a lot. It just kind of ends Wataru's adventures and that's it.
You can definitely tell that the animation is from the 80's. Take that for what you will.
Still though, I think it's worth watching just for its originality if nothing else. If you enjoy vintage 80's anime then go pick it up. If not... I don't know... go read a book or something.