Lori Shepherd is no stranger to trouble and intrigue. But when Bill, her high-profile attorney husband, receives a number of chilling death threats aimed at his wife and his five-year-old twins, danger hits closer than ever to home.

While Bill stays in London to work on the case with Scotland Yard, Lori and the twins flee for their own safety to the home of Sir Percy Pelham, an eccentric and fabulously wealthy adventurer who lives in a vast and mysterious castle on a remote island just of the coast of Scotland.

There, a mystery begins to unfold and soon Lori is knee deep in another elaborate and dangerous whodunit. She suspects that the locals are making a fortune running an illegal smuggling operation. What else could explain their luxurious, carefree lifestyle? But after finding a human skull washed up on the beach, Lori fears something even more sinister is going on.

With Aunt Dimity's supernatural help, Lori begins to piece together the clues, unaware of the growing danger on the island. Will the murderous threats against her family catch up with her before the case is solved? With its delightful characters and enchanting setting, Aunt Dimity and the Deep Blue Sea will have fans once again cheering for their favorite supernatural sleuth.