Seventeen years after the fall of the Third Reich, Max Weill has never forgotten the atrocities he saw as a prisoner at Auschwitz - nor the face of Dr. Otto Schramm, a camp doctor who worked with Mengele on appalling experiments and who sent Max’s family to the gas chambers. As the war came to a close, Schramm was one of the many high-ranking former-Nazi officers who managed to escape Germany for new lives in South America, where leaders like Argentina’s Juan Perón gave them safe harbor and new identities.

It is the spring of 1945, and in a dusty, remote community, the world’s most brilliant minds have come together in secret. Their mission: to split an atom and end a war. But among those who have come to Robert Oppenheimer’s "enchanted campus" of foreign-born scientists, baffled guards, and restless wives is a simple man in search of a killer. Michael Connolly has been sent to the middle of nowhere to investigate the murder of a security officer on the Manhattan Project.

It is 1946, and a stunned Europe is beginning its slow recovery from the ravages of World War II. Adam Miller has come to Venice to visit his widowed mother and try to forget the horrors he has witnessed as a U.S. Army war crimes investigator in Germany. Nothing has changed in Venice, not the beautiful palazzi, not the violins at Florian's, not the shifting water that makes the city, untouched by bombs, still seem a dream.

A neutral capital straddling Europe and Asia, Istanbul has spent the war as a magnet for refugees and spies. Even American businessman Leon Bauer has been drawn into this shadow world, doing undercover odd jobs and courier runs for the Allied war effort. Now, as the espionage community begins to pack up and an apprehensive city prepares for the grim realities of postwar life, he is given one more assignment, a routine job that goes fatally wrong, plunging him into a tangle of intrigue and moral confusion.

Berlin, 1963. An early morning spy swap, not at the familiar setting for such exchanges, nor at Checkpoint Charlie, where international visitors cross into the East, but at a more discreet border crossing, usually reserved for East German VIPs. The Communists are trading two American students caught helping people to escape over the wall and an aging MI6 operative. On the other side of the trade: Martin Keller, a physicist who once made headlines, but who then disappeared into the English prison system.