The film's plot takes a deeply poignant and tragic turn in its final act. After Mario and Beatrice marry, with Neruda as a witness, the poet's exile ends and he returns to Chile. Years pass, and Mario receives no word from his friend, a silence that deeply saddens him. During this time, Mario becomes more politically active, siding with the local communist party against a corrupt Christian Democrat politician. He names his son Pablito, in honor of his mentor.
Mario's transformation culminates in his decision to recite a poem he wrote at a large communist demonstration in Naples. The demonstration, however, is violently broken up by the police, and Mario is killed in the chaos before he has a chance to read his work. His death is quiet and off-screen, a tragic end to his journey of finding his voice. Five years later, Neruda returns to the island. He finds Beatrice and his namesake, Pablito, at the inn. It is from Beatrice that he learns of Mario's fate. She gives him the tape recording Mario had made for him years earlierβa 'poem' composed of the sounds of the island: the waves, the nets, the wind, the church bells, and the heartbeat of his then-unborn son. The film ends with a heartbroken Neruda walking along the beach where he and Mario once talked, listening to the sounds of his friend's world, intercut with visuals of the demonstration where Mario died. The ending reveals that Mario's greatest poem was not one of words, but of love for his home, a final, unheard message to his mentor.