Investigating the murder of a Louvre curator, Harvard symbologist Robert Langdon and French cryptologist Sophie Neveu find clues painted into a Da Vinci work, inadvertently uncovering a plot involving the Holy Grail and the secret society known as the Priory of Sion.
U.S. Marshal Teddy Daniels and his partner Chuck Aule begin to fear for their own lives and sanity when their investigation on Shutter Island into how a patient escaped the Ashcliffe Hospital for the Criminally Insane yields more questions than answers.