Eileen Couture, a gifted linguist from Oxford, is recruited in 1956 to teach English to the daughters of Dieter and Ingrid Schrögelmann, a rising STASI family in East Berlin. Her assignment is framed as benign cultural influence, but she quickly realizes she is being used as a legitimizing presence inside a household under increasing internal scrutiny. The girls—Karin and Monika—are bright, curious, and eager to learn. Eileen becomes deeply attached to them. But as political tensions rise within the GDR, the children are quietly repurposed by the state: pressured to recall conversations, observe adults, and report linguistic details they barely understand. Their intelligence makes them valuable. Their innocence makes them vulnerable. When internal power struggles intensify, the girls are subjected to escalating “memory rehearsals.” Karin collapses under pressure, suffering psychological damage that leaves her unable to speak. Monika resists and experiences a neurological breakdown. One is institutionalized; the other becomes a silent, trembling shadow of herself. Eileen is removed from the household and extracted from Berlin. Her MI6 handler, John Adderley, dismisses the girls as “unfortunate collateral.” Decades later, Eileen’s daughter Emily, now an academic specializing in ethics, uncovers her mother’s notebooks and the traces of what happened in Berlin.