Revna is a factory worker, manufacturing war machines for the Union of the North. Caught using illegal magic, she fears being branded a traitor and imprisoned. On the front lines, Linné defied her father, a Union general, and disguised herself as a boy to join the army. Their only reprieve from punishment: using their magic in a special women's military flight unit and undertaking deadly missions under cover of darkness. Revna and Linné can hardly...

In 1943, a British fighter plane crashes in Nazi-occupied France and the survivor tells a tale of friendship, war, espionage, and great courage as she relates what she must to survive while keeping secret all that she can.