During one of the night’s rests, the main character will have a nightmare with a noisy river. You should find the location called Nettle’s Crossing, which is located on the right of Old Sycamore.
Head for this location, then go to the top right corner and talk to a ghost. He will ask you to do that you were going to do according to the quest – to kill Stag Lord. Agree with him.
When you deal with Stag Lord, go back to the crossing and tell Davik Nettles’ ghost about that.