Gearlock Holmes is an "amalgamated person," what we in less enlightened times than Holmes' might call a robot, or a droid. He's been retired to the countryside for some time now, raising bees, but when a crisis arises, he sends for his old friend, Dr. Watson.
The crisis is that his housekeeper, Mrs. Hudson--also an amalgamated person--has been taken into custody for the murder of one of Holmes' guests.
It's a neat little mystery, and both the characteristics and the legal standing of amalgamated persons are crucial to how the story plays out.
Recommended for a quick, fun read.