Requires completion of Therion’s Fourth Chapter to unlock. Fast travel to Bolderfall and head to the Ravus Manor to find Heathcote right outside of the main door. Some thief managed to sneak into the mansion and delivered a letter, saying he’s going to steal a precious gem. Mosey along to Wispermill and not far from the windmill at the top of the town is an Old Man. Use Guide or Allure on him, then return to Heathcote in Bolderfall; speaking to him with the Old Man behind you will finish the quest.