The world didn't end in fire or flood, it ended in a hard reset that killed ten billion people, and the survivors on the moon built a cage around the new world out of pure fear. You watch humanity rebuild from nothing while the people who escaped Earth stare down at their former home through prison bars they built themselves. The tragedy isn't the apocalypse, it's what happens after, when the people who lived move to murder the people they abandoned, and neither side is wrong.
In 2099, Earth tilts off its axis and the planet becomes almost unrecognizable. Three years of disasters follow, wiping out its population of ten billion and leaving just two million people alive in colonies on the moon. Once conditions settle, some of those colonists head back down to repopulate the world, founding seven new cities on its altered surface. The colonists who stay behind fear that their former neighbors could become a threat. Rather than welcome them, they build a ring of defensive satellites meant to keep the resettled population confined to Earth. The result is a two-episode science fiction drama set among humanity's scattered survivors.