"A thousand years ago, if you heard a song and wanted to hear it again, you would have to remember it by heart. If you forgot the song, it could be lost forever." Italy's Guido d'Arezzo changed all that with a system of musical notation that allowed people to read music much as they read words in a book. Portrayed as a misunderstood, driven, and ingenious hero with the sympathetic ear of just one lone monk, this is the story of Guido and his invention: modern-day solfege. When Guido finally proves that his invention works, his triumph resounds through the ages. His story is certain to capture the imagination of any budding musician.