The humans of Ergoth continue to encroach upon Thorbardin, but the worst threat to the dwarven fortress comes from a mysterious fog-beast and a covetous wizard. A Cobar, a kender, and a giant raptor add to the confusion as the dwarves are faced with wizards who command not only the forces of magic but thousands of mercenaries as well. And, unknown to the dwarves who valiantly fight the invaders, the beast has already claimed Thorbardin for its own.