White Plume Mountain has always been a subject of superstitious awe to the neighboring villagers. People still travel many miles to gaze upon this natural wonder, though few will approach it closely, as it is reputed to be the haunt of various demons and devils. The occasional disappearance of those who stray too close to the Plume reinforces this belief.
Thirteen hundred years ago, the wizard Keraptis was searching for a suitable haven where he could indulge his eccentricities without fear of interference. He visited White Plume Mountain, going closer than most dared to, and discovered the system of old lava-tubes that riddle the cone and the underlying strata. With a little alteration, he thought, these would be perfect for his purposes. The area already had a bad reputation, and he could think of a few ways to make it worse. So he disappeared below White Plume Mountain and vanished from the knowledge of the surface world.
Today, the once-feared name of Keraptis is not widely known even among learned scholars. Or it was not widely known, that is, until several weeks ago, when three highly valued magic weapons named Wave, Whelm, and Blackrazor disappeared from the vaults of their owners...