Raphaël Jerusalmy's debut novel takes the form of the journal of Otto J. Steiner, a former music critic of Jewish descent suffering from tuberculosis in a Salzburg sanatorium in 1939. Drained by his illness and isolated in the gloomy sanatorium, Steiner finds solace only in music. He is horrified to learn that the Nazis' are transforming a Mozart festival into a fascist event. Steiner feels helpless at first, but an invitation from a friend presents him with an opportunity to fight back. Under the guise of organizing a concert for Nazi officials, Steiner formulates a plan to save Mozart that could dramatically change the course of the war.