“It's a dangerous business, Frodo, going out your door. You step onto the road, and if you don't keep your feet, there's no knowing where you might be swept off to.”
-- J.R.R. Tolkien, The Lord of the Rings
I'm so curious as to what is really going on here and why did the builders create the City of Ember in the first place. I hope the ending isn't disappointing.