You can pick up this quest from Arfur in Bowerstone after you have been to Westcliff for the first time. He’ll send you off to Brightwood to contend with a plucky farmer.
Enter Brightwood and follow the golden trail to find a bandit camp. When you reach the right spot, you will need to use the whistle expression three times to summon Reaper. Reaper will tell you to kill the farmer and his guards. Follow the gold trail to fond the farm and kill the guards outside. Once they are all pushing up daisies, Farmer Giles will emerge from the farmhouse. Kill him to complete the quest.