Sorian

Disaster plagues a small town. People are kidnapped, found dead, or never found at all. But this town is no normal place, it is backwards. Sane adults are locked away in jails, or worse. Sensible children are enrolled into a school for the "Mentally Disabled", and seem to lose their memories after entering the fog that surrounds the school. There are few students enrolled at that school who figure out what's happening, but they never get the chance say anything. Because they're never seen again, until they venture through the doors of the school one day, completely different. Even the teachers there go missing from time to time, and then return with entirely different personalities.