A Bolu is a choral tale, a journey through Sardinia, aimed at discovering one of the most authentic cultures of the island, pastoralism, which finds a synthesis and a genuine expression in tenor singing. The stories of the characters begin with their most important gathering: the film starts with a flashforward scene that anticipates the ending: a huge townfolk party. The facts about the faces, the voices that the viewer discovers in that celebration are explored in the journey, encounter after encounter, step by step, which ends in the great community celebration.