Glimmerhold, an ancient dwarven city-kingdom, is under attack! A casual dungeon exploration has unleashed a host of hideous monstrosities from deep beneath the earth that threatens to destroy Glimmerhold. The ancient dwarven city has a dark secret, one that may turn the players against its rulers and force them to make the ultimate decision: save the city of Glimmerhold, or destroy it! This Pathfinder Module, written by RPG Superstar winner Christine Schneider, is designed for a party of 10th-level characters.