From the cover: A deadly blue mist fills the streets of Fair Haven, slaying many of the small townís inhabitants and driving the rest insane. The mistís source is hidden in the townís dark sewers. To save Fair Haven, the heroes must explore the catacombs beneath the town, solve an ancient riddle, and defeat a sahuagin menace. But their journey does not end there ñ for an unspeakable devil from a forgotten plane of existence lurks within the mists...