I remember this quest being for a duo or a small group- we had to go through a cave and get to a final cavern and (if I remember right) close some kind of dimensional warp, which was guarded by various baddies. The most memorable part of this quest was the scene at the end when you turned it in to the quest NPC- a cutscene, incorporating your character and a host of NPCs around you, makes you feel rather heroic- you even took a bow. Not bad! I'm trying to remember when my character started being incorporated into cutscenes...LOTRO maybe?