December 1888. Mary Morstan — governess, fiancee of Dr. John Watson, secret witch — and Sherlock Holmes travel to Edinburgh in response to a frantic letter from the headmistress of the Frazier Academy. There, they find the teachers and students being terrorized by … something. Can Mary stop the creature before anyone else is hurt? And can she trust Holmes with her most dangerous secret?

This is a 12,000 word historical/gaslamp fantasy novelette. While it contains some frightening scenes, it is appropriate for all ages from tween to adult.