My idea revolves around a post sociaty world in which plants have overgrown all major cities, tearing through roads and spiraling up sky scrapers weakening underground tunnels even collapsing some in places. However this is not the decades after sociaty that first glance would have us suspect but merely weeks and though by day the world appears to be as lust and wonderous as the graden of Eden, by night the last surviving humans, maybe only a few thousand world wide, are in a constant battle to survive.