In 2006 a long-forgotten canister of film was discovered in a church in Devon, a county located in the southwestern corner of the United Kingdom. No one knew how it had gotten there, but its contents were tantalizing--the grainy black and white footage showed members of the German SS and police building a road in Ukraine and Crimea in 1943. The BBC caused a sensation when it aired the footage, but the film gave few clues to the protagonists or their task.

World War II historian G. H. Bennett pieces together the story of the film and its principal characters in The Nazi, the Painter...