The quest is called "The Fate of Norrath" and it starts in Kunzar Jungle behind City of Mist. Go up there, you'll see some dead Lucanic Knights and Qeynosian Guard. Harvest some stuff, then turn your graphics up and harvest a billy doll. Then, you need to swim around in the water under City of Mist - on of the supports there's a door, go in there to finish updating the quest.
It is the Raid Progression quest, and first real step besides the harvests and clicking a few things is to complete the Tier 1 Raids.
You must be level 80 to start this quest.
Locked Flag-Based Progression. Every member needs to be flagged to enter these raidzones. To enter T2 raidzones, you must have beaten all Tier 1 raidzones. To enter T3 raidzones, you must have beaten all Tier 2 raidzones.