The Witcher 2: Assassins of Kings -
"Asking about Triss, you'll learn that a local drunkard claims to have seen a woman fall from the sky. Find him and interview him. He'll tell you he saw a troll abduct Triss. Head out the western gate and into the ravine. You'll encounter the troll cooking dinner. Take a non-aggressive stance and agree to find his wife without hurting her. Follow the map to find her under attack by mercenaries. Defend her and attack their leader. He'll surrender soon enough and tell you about Letho. Bring Triss's bandana to the sorceress.