From the frontpage of the module: The fabled Passage of Sölerorin leads deep beneath the Hellfurnance Mountains, rumored to hold mysteries and treasure. Your group has prepared for a curious and perhaps lengthy expeditiondeep under the Flanaess. The town of Dark Gare is your last stop in civilization before leaving on your sunless journey. As you approach Dark Garehowever, you see an ominous column of smoke reaching into the sky. And where there's smoke. An adventure for APLs 2 to 16.