"They said it would bring us a new age of wonder, of exploration, of excitement. I don't think this is what they meant: us scurrying around like rats in our cities of steam and steel, far away from the land and the sun."
An industrious colony of Gnomes have managed to turn a hostile environment into a bread basket.
The People of the pocket realm of Brocschtal are simple folk who live as they have for thousands of years. Farming the land, raising sheep, getting in the occasional brawl. And fighting off the infernal attacks of ghouls.
They should have spoken up sooner and saved poor Harold from certain embarrassment.
The world was ripped apart in a great cataclysm 3,000 years ago. This is a Codex of the pocket realms created by that great sundering.
Three cities that come and go, yet never see the shining sun.
The Imperial city has been sucked into hell and the rest of the world has been ripped apart. And tying it all together is the Crystal Tower. The Tower lives in all realms, a needle piercing the fabric of each reality and threading them all together.
A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.