Fortunately, the interview subjects (who include festival performers and current and former Estonian leaders) are very intelligent and well-spoken. Their stories are what really holds out interest here.
Booster-ish, with only former participants in the struggle and activists interviewed. There's a you-must-feel-good thrust (and an incessant score). Warbles a familiar tune to Estonians, presumably, and doesn't offer enough rich notes for an outsider.
This fine and surprising documentary asks an even more challenging question: Can music promote nonviolence, prevent bloodshed and successfully overthrow an oppressive regime? Again -- astonishingly -- the answer is 'yes.'
As far as the plot goes, widespread lack of familiarity with Estonia's recent history actually works in the film's favor: Suspense born of ignorance lends the unfolding drama the urgency of a political thriller.
What makes the film unique is its intermittent focus on one of the country's cultural touchstones: a song festival called Laulupidu, and its role in bringing freedom to a repressed but restless people after a half-century.