This quest is not available in game.
Gather 6 discolored worg hearts and bring them to Apothecary Renferrel at the Sepulcher.
My brother Quinn was badly hurt by the ghoul, Ivar the Foul, and I don't know if he will heal properly without magical aid. Although I am not an apothecary, I do know that our apothecaries can make healing potions from the discolored hearts of worgs.
Gather such hearts and take them to Apothecary Renferrel at the Sepulcher to the south. Then return here with the potion.
You can find plenty of worgs between here and Malden's Orchard to the east.