Take a right as you head inside. You will find a path that heads down into a ring lined with several jail cells. Kill the guards until you get the key. The second door on the left should be Marshall Windsor.
Step2
Talk to Windsor, then head back to Morgan’s Vigil and talk to Maxwell. Once you have talked to him, head back to BRD and start killing guards until one of them drops a Crumbled Note. This begins a quest. Take the note back to Windsor and he will give you a quest to search for his lost information. This is being held by General Angerforge and the Golem Lord Argelmach. Fight your way through the place until you find them (clearing out the instance is helpful.)
Step3
In the area around where you first came in, there will be more rings filled with jail cells and guards. It will GREATLY aid the next part if you clear these now.
Step4
Return to Marshall Windsor when you have finished clearing the rings. This is where it gets tricky. You must now escort Windsor to the exit, only he takes the most roundabout route, he cannot be healed, and he stops along the way to settle grudges. However, he does provide an excellent buff, which you MUST stay near him to have! If you get too far away, you loose the buff.
Step5
Keep everyone as close to Windsor as possible until you hit the exit. DO NOT leave the instance until you have talked to him again!
Step6
Head to the gates of Stormwind when you are done. Talk to the Squire, wait for Windsor to spawn (notice his horse’s name?) then walk with him through Stormwind. He will lead you up to the keep, where he revels the true nature of Lady Prestor. The next bit is CRITICALL IMPORTANT!
Step7
Once Marshall Windsor meets his fate and enemies spawn, DO NOT, I repeat, DO NOT attack them! They are 60 elites and to attack them is suicide. All you need do is back off and allow the Highlord to do his thing. He and a ton of Stormwind Guards will immediately set upon your assailants and pound them into the floor. Once again, when the enemies spawn, DO NOT ATTACK THEM!
Step8
Talk to the Highlord when it is finished. He will give you a Medallion that you must take to a lady named Haleh, in Winterspring. To be concluded!