Set in 18th-century Vienna, this historical fiction novel tells the untold story of Maria Anna Mozart, the brilliant but forgotten sister of the famous composer Wolfgang Amadeus Mozart. While Wolfgang is celebrated as a prodigy, Maria Anna is forced to suppress her own musical genius to fulfill her role as a proper lady, yet she secretly composes her own symphonies. As she navigates the rigid expectations of the court and her own family, she must decide whether to remain in the shadows or risk everything to claim her voice as a composer in a world that refuses to see her talent.