A secret chamber.
A mysterious shipwreck.
A murder in the desolate salt marshes.
A seemingly straightforward private case turns out to be much more complicated-and sinister-than Special Agent A.X.L. Pendergast ever could have anticipated.
Pendergast, together with his ward Constance Greene, travels to the quaint seaside village of Exmouth, Massachusetts, to investigate the theft of a priceless wine collection. But inside the wine cellar, they find something considerably more disturbing: a bricked-up niche that once held a crumbling skeleton.
Pendergast and Constance soon learn that Exmouth is a town with a very dark and troubled history, and this skeleton may be only the first hint of an ancient transgression, kept secret all these years.