From the front of book: Rumors of an alliance between the Council of Blades in Mulmaster and a group of Banite Warlock Knights of Vaasa portend evil for the entire Moonsea region. Your patron has asked you to join an expedition to the Delhalls, a mine rich in gems and copper where a recent earthquake has revealed new passages. The miners say that strange, haunting melodies resound in the depths, luring men to their deaths. While concealing your true allegiances, you must discover the source of this mysterious song and determine whether it will be an adversary or an ally in the fight against the Black Lord. A Living Forgotten Realms Core Special adventure set in Vaasa for characters levels 11-14.