Get a Magical Explosive Device on the ground floor near the entrance ( 135, -16, 129 ) Copy/waypoint 135, -16, 129, and place it on the third floor in the supply area ( 154, 0, 134 ) Copy/waypoint 154, 0, 134 and activate it.
Free the prisoners in the holding cells in the dungeon basement ( 158, -26, 142 ) Copy/waypoint 158, -26, 142.
Get another Magical Explosive Device on the ground floor near the entrance ( 135, -16, 129 ) Copy/waypoint 135, -16, 129, and place it in the dungeon holding cell with the weapons ( 141, -26, 140 ) Copy/waypoint 141, -26, 140 and activate it.
Go back up to the ground floor where you will be captured, and wake up in Haven.
Speak to Scout Elrohir in Haven ( -55, -70, -106 ) Copy/waypoint -55, -70, -106 to complete the quest.
This section applies to people who have betrayed their city and become an Exile.
After You've Betrayed...
So you betrayed your city, got kicked out and sent to Haven. You may choose to remain as an exile, and unwelcome in ANY of the aligned cities, or you can choose a city and work to gain faction until they will accept your application for Citizenship. You can even go back to the city you betrayed - but you'll have to earn just as much faction regardless!