A coded symphony. A forgotten resistance. Two women connected by the music that could expose it all. Vienna, 1798 - Sixteen-year-old Liesel Albrecht uncovers a mysterious manuscript hidden inside an old piano-one her opera-singer mother left behind before vanishing without a trace. The sheet music isn't just a composition. It's a cipher-pointing to a secret resistance working against the empire, hidden in operas, rhythms, and silence. Forced to take her mother's place, Liesel enters a dangerous world of coded concerts, masked informants, and musical rebellion. London, Present Day - Ava Moreau, a gifted but burned-out sound archivist, discovers a scorched piano from an Austrian estate fire. Inside, she finds a sealed scroll of music. As she decodes the strange notations, Ava realizes the piece is connected to a lost composer-and a truth someone still wants hidden. The Composer is a sweeping, time-split historical mystery blending music, memory, and quiet courage. For fans of Kate Morton, Kristin Harmel, and anyone who believes some messages are meant to be heard... and some, to be followed.