Gundren Rockseeker is a wealthy, dwarf merchant. He has two younger brothers, Nundro and Tharden. Together, they planned to explore Wave Echo Cave and recover its riches. Unfortunately, on his way to Phandalin, he was waylaid by goblins in the pay of the Black Spider. He was captured and taken to Craigmaw Castle, along with the map showing the location of Wave Echo Cave.