New Orleans, 1944. . That's the word on factory worker Justine Byrne's mind as she is repeatedly called to weld machine parts that keep failing with no clear cause. Could someone inside the secretive Carbon Division be deliberately undermining the factory's Allied war efforts? Raised by her late parents to think logically, she also can't help wondering just what the oddly shaped carbon gadgets she assembles day after day have to do with the boats the factory builds. When a crane inexplicably crashes to the factory floor, leaving a woman dead, Justine can no longer ignore her nagging fear that German spies are at work within the building, trying to put the factory and its workers out of commission. Unable to trust anyone—not the charming men vying for her attention, not her unpleasant boss, and not even the women who work beside her—Justine draws on the legacy of her unconventional upbringing to keep her division running and protect her coworkers, her country, and herself from a war that is suddenly very close to home.