The heroes have learned the identity of the evil that plagues Korvosa the vile remnants of an evil dragon who once ruled much of Belkzen as a sadistic warlord. In order to defeat him again and save both Korvosa and the queen, the PCs must journey deep into the orc-held lands of Belkzen and brave the haunted reaches of Castle Scarwall, once the dragon's seat of power. Somewhere deep inside waits the holy weapon Serithtial, the sword responsible for his defeat hundreds of years ago. Only on its edge can the dragon be driven from the world.This volume of Pathfinder also features a gazetteer of the brutal lands known as the Hold of Belkzen, a presentation on Zon-Kuthon (god of darkness and pain), and several new monsters native to Belkzen and the haunted depths of Castle Scarwall.