Dwarfs are united and paranoid race. That are resons for creating Akamkulet Tholtosid Zanos, Fortuneabbey the Deep-Armor of Hope, a supposed last bastion of dwarven race. Heavly fortified and self-sustainable it's location, and existance, are hidden from all other races, and even most dwarfs are unaware of it's being.
But after thousands of years in seclusion, it's secret is out...
One renegade dwarf has escaped the Tholtosid in search of adventure, but instead he found demise. On his first dungeon, his party was defeated by an host of goblins. Seeing dwarf's unusual equipment, goblin decided to bring it to Nilbog Govos Agothsherik, king of Sumspangosla, the Undermountain. The great Nilbog, in all his wisdom, interrogated and tortured the foul creature. After ten years of screams and agony the dwarf broke and revealed location of it's home. The most wise Nilbog, in all his greatness, gathered his most skilled subjects to infiltrate the Tholtosid, learn it's secrets, and report back, so the goblinkind can strike those wretched creatures in their most vital place!