Eons ago, the Old World faded. Some tell of a sea of fire. Some of air that spoiled and made throats raw. Some of a sickness that ravaged the land. But all refer to it as the Calamity. Those that were left retreated to our Havens, huge silos, deep underground. Hundreds were built, across the more habitable areas of the Old World. Some connected to form Mega-Havens, but some were simply left, alone, forgotten, waiting for the moment to return to Surface. Each of these Havens developed independently, to form communities, ecosystems, and they changed. Homo-sapiens was no more.