In the ancient past, the Censer of the Damned was created by the goddess Lloth as a prison for the souls of those who had failed her in the great elven civil war. There they would remain, to be called forth to wage their war once more through the living until such time as they might attain victory.
For the past few months, the censer has been kept under lock and key in Doma Castle. However, this state of affairs cannot continue forever; already there has been one close call, and the drow would dearly love to acquire the censer for the glory of their goddess.
After much research, a possible method of destroying the artifact has come to light. The key lies in the north, with the dwarves of Karaz Gathol and an even more ancient artifact known as the Anvil of Breaking.
Accordingly, the usual gang of misfits has been assembled, some of them people who have dealt with the censer before, others whose reputations have impressed the Crown, and a couple arriving thanks to General Silvar's habit of posting notices at the local bars.
-----------------------
And there we have it. While this campaign particularly suits characters involved in Nightfall or Echoes (good lord, those were both a while ago now), it's open to all comers.