Triss and Four escape over the wall to discover what happened to the rest of the world.

The Witcher 3 Wild Hunt is a massive game and you can, more or less, do whatever you want within its borders. And that includes exploiting the fixed systems of the world to make a shedload of cash and basically break the in game markets.

The Witcher 3 Wild Hunt has had a lot of extra material added since release, but fans are still waiting for more material for Triss