Disgraced when her village's mysterious healer, an Eastern European immigrant whom she loved and begged to help her have a child, is arrested as a war criminal, Fidelma flees to England to take migrant work, only to confront her nemesis at a tribunal in The Hague.

To finally secure justice and protect the ones they love, two former female spies, American Josie Anderson and Parisian Arlette LaRue, aka the Golden Doves, risk everything to hunt down an infamous Nazi doctor in the aftermath of World War II.

Sent to Vienna to authenticate a painting, art restorer and occasional spy Gabriel Allon sets out to uncover the truth about a photograph of an unnamed man who had brutalized his mother during the final days of World War II.

When four of his fellow assassins are murdered by Serbian war criminals, Louis arrives in Europe to find and punish five killers before they can vanish into this air—there is just one problem—the sixth.