'2112,' Rush (1976)

Sacred as this song is, it's surely cinematic enough to have movie adaptation potential. A man, one of many under the thumb of a super-oppressive regime, unearths a musical instrument (forbidden in this fictional world), discovers beauty, and realizes all that he and his fellow citizens are being robbed of. If Ayn Rand were still alive, she'd be a great consultant; if Stanley Kubrick were alive, there's your director.