In their Absence
I'm not sure if it's part of the epic quest line (probally not), but according to Lorebook (the official LOTRO wiki) it's part of [=str3&increases_decreases=1&x=79&y=16 Volume III: Allies of the King]. Which is the reason I added it.
I've been adding quests that are only labled as being "epic" in the in-game quest tracker. Many of them are done by region. The In Their Absence quest line is a little unique. --Pinkkeith 16:55, 15 April 2011 (UTC)