You are in a cave deep inside the Moolooite Mines, where ghosts seem to have materialized just enough to defend their territory and hurt trespassers, such as your party. You went inside because monstrous aberrations attacked nearby villages, and they seem to have come from inside these long-abandoned caves.
Dig your way through portals, tunnels, and locked doors in search for the mighty Ghost Lord and Ghost Mage. Kill them to win this mission. Meanwhile, you may take some time to do your own excavation and loot an incredibly rare Bauronite Ore that some ancient dwarf must have found in the mountains. This ore has a magical property that allows you to easily bind it to ordinary items, enhancing them.