Sometime CIA operative Max Benedict is paired with former lover and FBI special agent, Kristin Lassiter, to investigate a foreign threat against the president in London. What Max doesn't know is that Kristin has her own secrets to keep.

Cartographer John Graf, shunned by his Amish community for pursuing higher education, becomes embroiled in a mystery when the remains of 17th-century mapmaker Cellarius, the subject of centuries-old conjecture, emerge from a German bog. The discovery of his corpse and a ruby clutched in his death grip gives credence to the existence of the fabled Tavernier Stones, a cache of the world's most prized missing jewels. Graf joins forces with a gemologist-turned-grifter...