Acre, 1291 A.D. – As the city burns under the onslaught of the Sultan’s men, the Falcon Temple sets sail, carrying a small band of knights and a mysterious chest entrusted to them by the Order’s Grand Master. The ship vanishes, without a trace…

New York City – Present Day: At the Metropolitan Museum, four horsemen dressed as Knights Templar storm the gala opening of an exhibition of Vatican treasures and in a brutal, bloody attack, steal an arcane medieval decoder. For FBI agent Sean Reilly and archeologist Tess Chaykin this is just the start of a deadly game of cat and mouse s they race across three continents in search of ruthless killers and a centuries-old mystery.