The Witcher 2 Walkthrough Part 45: Where Is Triss Merigold (Loc Muinne) Part 2

Triss will be kept in a dungeon in the back right-hand corner of the camp. Head up the climbable area to the right side of the arena, and climb up onto the walls. Jump down into the next area, then turn to the left to find Triss’ dungeon. Use the keys that you looted off of Renuald’s body to open up the dungeon door. Rescue Triss and speak with her to advance the story. (Spoiler) You will learn that Triss was indeed a member of the Lodge of Sorceresses, although if the Nilfgaardians were possessed of the idea of Triss being a powerful member, they were quite mistaken. In fact, Triss really had no influence in the Lodge at all. You will discover that the Lodge of Sorceresses plotted to have Demavend, the old ruler of Aedirn, killed. This plot was thought up by none other than Philippa and Sile, the sorceress who you encountered when you were fighting against the Kayran. Triss will continue to unravel the plot for you, telling you of Sile’s connection to Letho and how the two have been working together the whole time. (End Spoiler.)

Head back out into the camp when you are ready to leave. All of the doors in the area will be unlocked now thanks to Renuald’s keys. Search a few of the doors surrounding the dungeons to find various trinkets, like money and crafting items. Nothing too important is housed in any of the buildings, though, so if you want to skip this part and move on to the next section of the quest, don't feel like you've missed too much. When you are ready to leave, head to the entrance from where you originally came in. Triss will tell you that you should both arrive at the peace summit at the same time. This will initiate the A Summit Of Mages quest. You will receive 2,500 experience points for saving Triss. You will now be free out in the world again. This will be one of the last chances that you will have to do side quests, so you may want to consider exploring the town and picking up as many of the smaller quests as you can, if you didn't do it earlier when deciding how best to infiltrate the prison. Just keep in mind that all of the guards will be hostile towards you, so you should do your best to avoid them or kill them quickly.