Okefenokee

A boy was raised in the black swamp after his family bugged out of civilization due to a bio-weapon release during a war in eastern Europe. He only knew his parents and his grandmother. His parents seemed happy in their paradise, but he naturally wanted to see the things they described to him and friends his age. He gets a chance to go to the mainland town and at first was excited by the remains of a once thriving town. It all changes when he encounters locals who turn out to be unfriendly.