For one woman in the aftermath of World War I, the city of light harbors dark secrets and dangerous liaisons.

After four years of horror The Great War has ended, and President Woodrow Wilson's arrival in Paris in December 1918 unites the city in ecstatic celebration. Major Jamie Fraser, an army physician who has spent ten months tending American soldiers, is among the crowd that throngs the Place de la Concorde for Wilson's visit. As an expert on the Spanish influenza, Fraser is also called in to advise the president's own doctor on how best to avoid the...