Art restorer and former secret agent Gabriel Allon hasn't been back to Vienna since a terrorist bomb tore his family apart. But when an old friend is almost killed there, in an explosion at the Wartime Claims and Inquiry Office, Allon is compelled to investigate. From the moment he arrives in Vienna, however, it's clear that people are hampering his search for the truth. And when a Holocaust survivor who could link a senior politician to Nazi atrocities is killed, Allon realises that he's already too deep into a conspiracy - one that goes right to the heart of his own family. Soon, Allon must decide between revenge and justice.