The amateur sleuths at the Sherlock Holmes Bookshop must call upon the powers of deduction in order to rid Baker Street of a ruthless killer Gemma Doyle and Jayne Wilson are busy managing the Sherlock Holmes Bookshop and Emporium on Baker Street and adjoining Mrs. Hudson's Tea Room in anticipation of the store's upcoming book signing with the illustrious Renalta Van Markoff, author of the controversial Hudson and Holmes mystery series...