When siblings Meren and Vayor inherit a mysterious polished stone, they unlock a world of echoes hidden in the world's greatest landmarks. From the choral hymns of Greece's Parthenon to the Tayrona chants in Colombia's Lost City, the stone plays centuries-old songs and stories, revealing how geography shaped human dreams and beliefs. Meren records each melody, Vayor maps the ancient routes, and together they transcend language through the stone's gentle translations. Their global adventure culminates in a "Concert of Cultures," where interactive maps and living music show young readers that every stone, every ruin, and every whisper across the earth carries a vivid, resonant story.