Regardless of the choice you make your cover is blown so start fighting your way through the guards. There is a tripwire trap immediately in front of you so disarm it before progressing. Make your way south through the metal door then turn right to enter a room with two barrels, a wooden crate, and a pile of sacks. Return to the hall and enter the next door to the southwest to find more guards. Beware the trap of fiery death that lurks as you enter the door to the south.
Unlock the three chests then enter the door at the north side of the hall where Torturers reside. Free the man on the Torture Rack to find out he is Oswyn . After some discussion you can gain his father’s approval at the coming Landsmeet and gain the quest “ Tortured Noble “. Back in the hall, follow the path east around the corner and enter the first room where the Jailor resides. Loot the key off him and open Rexel’s cage. You can let him go or put him out of his misery. You can open Soris’ cage at the end but it serves no real purpose at this time.
The last room on the east side has a chest. Check it and open the door at the northern end. Defeat Arl Howe by taking out his two Mages first and keeping the others stunned or immobilized. Loot Howe for the Biteback Axe and Arl Howe’s Key. Go north to find Vaughan where you can gain his voice for the Landsmeet and receive the key to his chest. Open Irminric’s cell door and ask him what he wants you to do to update the quest “Lost Templar”. Go up the stairs and head over to Vaughan’s room if you got his key. Open Vaughan’s Lockbox to find 40 gold, then go free Anora.
As you try to leave Cauthrien attempts to stop you. You can surrender or fight, which both allow Anora to escape. If you explain that Anora was being held captive then she betrays you and Cauthrien attacks anyways. Plot wise, you aren’t supposed to win this battle but if you do, Cauthrien drops the Summer Sword which adds to your Codex. Since this battle is nigh impossible to win then it is assumed you are captured.