Germany, 1939. After her mother is shot at a checkpoint, fifteen-year-old Sarah, finds herself on the run from a government that wants to see her, along with every other Jew, dead. Then she meets a mysterious man who needs Sarah to pull off a spy mission he can't attempt on his own: infiltrate a boarding school attended by the daughters of Nazi top brass, befriend the girl whose father is a high-ranking scientist, and find the blueprints to a bomb that could destroy the cities of Western Europe. With years of training from her actress mother in the art of impersonation, Sarah thinks she's ready. But nothing prepares her for her cutthroat classmates, and soon she's embroiled in a battle for survival unlike any she'd ever imagined--and fighting to hold onto her true self.