1000 years ago: World War III, superpowers exchange nuclear strikes, people die, space is warped in the radiation background and rifts open to other worlds, ash clouds threaten to block the sun from the inhabitants of the earth for thousands of years...
current time: after the war, only fragments remained, the Sun disappeared forever, but the world was filled with other plants from other worlds and many bioluminescent mushrooms replacing the sun. People are forced to coexist with other races: vaprishi, succubi, wolf girls and so on. New customs appeared due to necessity... now if more than 1000 people live in a city - it seems large and almost magical, because it has become harder to survive: a lot of resources, but dangers have also appeared in the form of otherworldly creatures, man-eating plants and traps-echoes of the past war.
you are one of the few survivors. You spent all this time in a cryochamber. And so you finally came out of the cryochamber in a half-destroyed laboratory, not knowing what was above: a settlement or maybe an endless desert, a forest of mushrooms or a tribe of wild cat girls - it all depends on luck...