Trouble at'Mill

Maelstrom Domesday is set in 1086. You are a group of ordinary people who had a supernatural experience, were ostracised from your homes for it, and found employment with a powerful Norman Baron to investigate supernatural threats that might destabilise his rule. In this case the local miller refuses to mill any grain. No reason is given, but as the penalty is the loss of his livelihood, and possibly death, there must be a compelling and mysterious reason. You don't have long before the lord loses patience and razes the whole village to the ground