Ghosts of the Past is a Side Quest in The Witcher 3: Wild Hunt. In this quest, Geralt encounters the former Witcher Letho.

In order to complete this quest, you must have spared Letho during The Witcher 2 for PC, or answered in the Nilfgaardian court that Letho is alive.

You do not need to pick up the quest “The Fall of the House Reardon” to start this quest; however, if you finish this quest before picking up "The Fall of the House Reardon," the latter will automatically be completed when you accept it.

Finding Letho

While this mission isn't particularly difficult, the approach to the farm is fought with traps. Just approach very slowly and keep using your senses. Traps appear on the minimap when you scan nearby. Walk carefully, sidestep the pits, and disarm or avoid the other traps.

When you reach the barn, you'll find a familiar old face. You can leave Letho to face the foes alone, but what's the fun in that? Jump into the fray and help and old friend out.

After helping him fight off bandits at the barn. Follow him on horse back to the man that betrayed him. Again, fight these bandits after Letho confronts the man that betrayed him. There is one more group you two need to confront. Ride off again to Lidenvale to fight the last group.

When you arrive, Letho threatens the men and gets shot in the shoulder. He’ll fall after killing some men. Don’t be fooled by this act! You have three options for the end of the quest.

Make sure to invite Letho to Kaer Morhen and the quest will end. Swing by the lady in town to wrap up the side quest “The Fall of the House Reardon” too