This is a fairly easy quest and begins by talking to Zoltan Chivay who should be at the Hairy Bear Inn. He’ll tell you that Leuvaarden might have some work for you. Head to the Dike and speak with Leuvaarden. He needs the landing at the Swamp Forest cleared of Drowners because it’s affecting business. See the Ferryman and ask to be taken over the lake. Once at the landing wait until nightfall and kill the Drowners that appear. Return to Leuvaarden for your reward of 400 Oren.