"The Escape Line's collapse would leave thousands stranded. Monsignor Hugh O'Flaherty, its architect and the acknowledged leader of The Choir, broods inside the Vatican, paralyzed by the perils of keeping his Roman underground railroad functioning. Meanwhile, SS Commander Paul Hauptmann has been tasked with destroying the entire operation, and the price of failure is high--his wife and children are under Gestapo lock-and-key in Berlin. Into this deliriously...