A Washington Post Best Book of the Year An Oprah.com Best Book of the Year In 1945, on the outskirts of Salzburg, American soldiers discover a train filled with unspeakable riches: gold watches and wedding rings, picture frames and Shabbat candlesticks. Jack Wiseman is the lieutenant tasked with guarding this treasure in the chaotic aftermath of war—a responsibility that grows more complicated when he meets Ilona, a fierce, beautiful Hungarian woman who has lost everything in the ravages of the Holocaust. Seventy years later, amid the shadowy world of art dealers who profit off the sins of previous generations, Jack gives a necklace to his granddaughter, Natalie, and charges her with returning it to its owner. And as Natalie searches for the woman whose portrait and unknown fate have come to haunt her, she will come to understand the secret her grandfather took to his grave.

Raoul Wallenberg, the Swedish diplomat who saved thousands of Budapest Jews in 1944-45, was arrested by the Soviets and taken to Moscow where he disappeared. Now, more than 70 years after these events, many mysteries about Wallenberg's life and fate persist. As both a literary detective story and historical investigation Alan Lelchuk uses a fictional investigation to explore what really happened.