You will find a map with directions to the camp of Sir Erhardt. Now put some noble/charismatic clothes on and examine the burned campfire side.
It is helpful to write the right answers down, because you have to pick the false ones later! Go through all dialogue options and make sure you remember the content of the parley. Contains spoiler and you will automatically do one achievement. For those who have ever wondered how to unlock the cute horse Nuckelavee, here is the solution.
