This quest is not available in game.
Kill Darkweaver Syth in the Sethekk halls, then free Lakka from captivity. Return to Isfar outside the Sethekk Halls when you've completed the rescue.
The Sethekk departed Skettis with great fanfare when Auchindoun exploded. Surely it must've been an omen of our master's arrival.
My brother, Syth, was one of their leaders and told us we were obligated to go into the temple ruins and face our god.
After we took up residence in the ruins, calling them the Sethekk Halls, I began to doubt my brother and his ally, Ikiss.
In time, Syth had me cast out of the Halls, but he refused to let me take our sister Lakka with me. Will you help me rescue her?