Now, determined to track down the killers herself, Bryony travels to Scotland to find Hamish Neville, a historian with whom her father had an ongoing correspondence.
After an attempt is made on Bryony's life, the two are forced to go into hiding, completely dependent on one another for their very survival. Piece by piece, they painstakingly assemble the puzzle to locate the lost book. But time is running out. Can they unlock the mysteries of the hidden treasure before the secret order catches up with them?