From publisher blurb:
Goblins are curious creatures. They seem to find their way into the most unlikely places… to include an abandoned dwarven training hall. The Hall of Stone was sealed and forgotten after a lengthy war in the UnderRealm long ago. The little critters have made a home in its upper rooms, leaving the locked sections untouched. What remains behind those closed doors may not exemplify the hall’s original prowess in challenges, but what remains will test anyone’s mettle.
Hall of Stone is a Q-Crawl, or Quick-Crawl, that can be run for a group of four to six players with 6th-level characters. This crawl would be considered a ‘medium’ to ‘hard’ encounter.