The party was hired in Neverwinter by a dwarven merchant named Gundren Rockseeker to escort a caravan to the small mining town of Phandelin. On the trail they found the corpses of the horses which Gundren Rockseeker and his hired body guard Sildar Hallwinter were riding.
After the party fought of an ambush by goblins who remained at the site, they tracked the creatures back to their layer. The party cleared out the caves which the goblins and found Sildar Hallwinter. After questioning a few of the remaining goblins the party discovered that they had sent Gundren Rockseeker to a goblin fortress called Craigmaw Hold. The goblins were asked to capture Gundren by someone called The Black Spider though the goblins didn’t know anything more than the name.