Talk to Inquisitor Tahlreth to learn of an upcoming attack by the Nobility on an Inquisition base. Your task is to warn the Commander of that base that the attack is coming.
Hurry to the main camp and warn the commander she's about to be attacked!
My spies tell me the nobles are planning to attack our headquarters. If they're right, the attack will come from the south. Get over there and warn the commander. You have my leave to depart!
Head north out of Sloeford; the quest will update once you cross the bridge.
You now need to head northeast to an Inquisition Camp just south of Benny’s Corn Circles (see map below).
As you approach the camp and the Resurrection Monolith, the quest will update; the attack is already underway. You need to kill five High Elf Guards, a task that you can often hang back and let other enemies in the area accomplish for you. Either wait until the Guards are dead, then mop up any other enemies still alive, or wade into the fray and kill anything that’s hostile.
Once the Guards are dead the quest is complete, and you can head into the camp to talk to the Commander and start the next quest, The Center of Power.