order to start this quest, find the blacksmith Willis (M1,2) in White Orchard Village. Talk to him and you will learn that this place has been sabotaged. Willis will ask you to find the firestarter. Activate Witcher Senses and start following the red footprints near the blacksmith house. The trail will lead you to Woesong Bridge in the village. Look closely at them and search for another trail near the boat. After watching them, get through the bridge and find shoes lying on the sand. The trail will lead to one of the cabins in the village (M1,3). Examine the last footprint, enter the cabin and find Napp hiding in the back. Watch his wound and start talking.
You can make two choices - release Napp or get him captured. If you choose the first option, return to Willis and tell him you haven't found the firestarter. If you want to capture Napp, you can defeat him in fist fight or use Axii sign to take control over him and make him go with you to blacksmith house. In both cases Napp will be given to Nilfgaardians. For this quest you receive experience (75 points + 25 for using Axii sign) and 20 crowns (received from Napp or Willis). If you have captured the firestarter, Willis will lower prices of his merchandise and services.