A series of trips, where-in the intrepid PCs investigate the ruined catacombs under the fallen shrine in the forests, which lead to numerous “wormholes” tearing apart the deep earth below the Westlaws. Most of these seem to congregate in a nexus of tunnels, and following the map they pulled from the Bugbear explorer, leads them to a hidden town known as “Slaveport”.
Slaveport is revealed to be a ruined dwarven fort, with many drow merchants and duergar farmers, all “commoners” living in relative squalor. The fort appears to be a frontier trade site, well beyond the control of the drow Houses, but remains important to the region. A powerful band of earth cultists have a base here, as do a group of gnoll mercenaries. “Wild Goblins” seem to live in the fringes of the caves, and it is rumored several small dwarf tribes live nearby.
In the nearby caves, they encounter a dwarven band, the “Dawn Rock” clan mining a major cave with a huge fissure in one side, and befriend them. Exploration also leads to a band of bugbears who are lairing at “the Watchpost” along a trail the PCs assume leads to their own goblin warrens. Eventually, the PCs explore most of the nearby caves, and even make a fleeting, if friendly contact with a drow House, House Morcane, through trade.
Lastly, they learn the true depths of the Underdark, its unlimited space and that many days away is a fallen dwarven city, “The City of Fountains”, wherein various factions are fighting for control of this once important port. Beyond these lands, lay the “Drow Borderlands”, where various minor Houses rule the caves, and beyond that, the lands of House Vrama and the “Drow Deeps”.