Walking her dog Violet late one night, Gemma Doyle, owner of the Sherlock Holmes Bookshop, acts quickly when she smells smoke outside the West London Museum. Fortunately no one is inside, but it’s too late to save the museum’s priceless collection of furniture, and damage to the historic house is extensive. Baker Street’s shop owners come together to hold an afternoon auction tea to raise funds to rebuild, and Great Uncle Arthur Doyle offers a signed first edition of The Valley of Fear.
Cape Cod’s cognoscenti files into Mrs. Hudson’s Tea Room, owned by Gemma’s best friend, Jayne Wilson. Excitement fills the air (along with the aromas of Jayne’s delightful scones, of course). But the auction never happens. Before the gavel can fall, museum board chair Kathy Lamb is found dead in the back room.