Hedwig was beautiful and married to a man she didn’t love. Fritz was an arms merchant and deeply possessive of his trophy wife.

At their home in Austria, Hedwig was a fly on the wall at more than a few dinner parties, listening quietly as important men discussed with her husband evolving technologies that would change the complexion of modern warfare. Fritz’s guests were intelligent and influential. Some were physicists. Some were inventors. Many were fascists. Many were Nazis.