We were shown a short cinematic video with a goblin complaining about adventurers. They're always invading his city, breaking his stuff, and looking for treasure chests they apparently assume the goblins just leave lying around. The monster goes on to explain how he lives, has to go to work, and doesn't have health care. But now, apparently, the goblins' relative peace is shattered by a mining operation that dug too deep. They hit an evil vein, or something, and unleashed hordes of necromancers into the caves.
You play as a sort of anti-hero who's tricked into working for the goblins to defeat the subterranean warlocks. Just because he's tricked doesn't mean the goblins are bad people. Their home, Goldstar City, reflects their diversity and attempts at leading normal lives. It's divided into four quadrants, Birch, The Greys, Oak, and Willow. Birch is the most religious district, where the goblins worship trees and preach arboreal sermons from street-side pulpits. The Greys are the slums, a district within which FireFly is trying to achieve Blade Runner-esque steamy streets and dirty walls. Oak is the industrial center of the city; mining and crafting war weaponry being the main professions. It seems the goblins are almost constantly at war with another group of the same species, the Red Eye clan. Finally, the Willow district is the mercantile hub of the metropolis.
