It's the breezy Scottish summer of 1936 and aristocratic sleuth Dandy Gilver, along with trusted colleague Alec Osborne, has been called to solve the strange case of the Cramond Ferrywoman, on the Firth of Forth. From their cheerless digs in a local stately home, Dandy and Alec track Vesper Kemp, the ferrywoman, to a tiny tidal island. She seems to have lost her mind, roaming the beaches in rags, ranting about snakes and mercury. What is even more...