Thousands of feet below the surface world, the city of Solypse churns trade in the shadows. While the races of the depths meet the merchants of the surface in the city, evil forces begin a relentless slaughter of anything in their path. With a temple unable to help, and a council unwilling to save its own people, it is up to an exiled dwarf, a reluctant assassin, and a failed acolyte to save the city from total annihilation.