Most of the activities associated with this secondary quest occur as part of the primary quest during Act I's Chapter 9 (Windstone Fortress). Shortly after your characters enter the area, they encounter Sartan in a square pit near Squadron Leader Taarth at the north end of the street, which runs down to the blocked main fortress entrance. Speak to Sartan in the pit to learn he's obviously none to happy to be there. Promise to try to help get him out to initiate the quest.

After activating the Azunite Artifact and having blown a hole in the north wall, which completes step 7 of the above mentioned chapter, return to Captain Dathry, who's standing at the end of the street just north of Sartan, to bring him the news. Speak to Soldier Orayne, who's standing behind the captain, and ask him to release Sartan to cause the platform he's standing on to be raised, releasing him from the pit.. Then head back over to Sartan and speak with him to either add him to your party or send him back to the Inn in Aman'lu. This completes this quest.