The Scarlet Triad - slavers at the center of a vast conspiracy - have been tracked to the Five Kings Mountains. There, in the subterranean city of Saggorak, the slavers have forged an alliance with a monstrous dragon. To stop them, the heroes must navigate a complex political landscape and perhaps make an alliance of their own with a dwarven king who's been dead for thousands of years!The Age of Ashes Adventure Path continues with Fires of the Haunted City, a complete adventure for 12th- to 14th-level characters. This fourth adventure also includes a gazetteer of the dwarven city of Kovlar, a discussion of the evil dwarven god of toil Droskar, and a wealth of new rules options for player characters to discover, along with more than half a dozen new monsters!Each Pathfinder Adventure Path volume contains an in-depth adventure scenario, stats for several new monsters, and support articles to give Game Masters additional material with which to expand their campaign. Pathfinder Adventure Path volumes use the Open Game License and work with both Pathfinder and Dungeons & Dragons 5E.