As a little girl raised amid the hardships of Michigan's Copper Country, Fenna Vos learned to focus on her own survival. Though she performs onstage as the assistant to an unruly escape artist, behind the curtain she's the mastermind of their act. Ultimately, controlling her surroundings and eluding traps of every kind helps her keep a lingering trauma at bay. Yet for all her planning, Fenna doesn't foresee being called upon by British military intelligence. Tasked with designing escape aids to thwart the Germans, MI9 seeks those with specialized skills for a war nearing its breaking point. But when a test of her loyalty draws her deep into the fray, Fenna discovers that no mission is more treacherous than escaping one's past.