One autumn evening in the town of Willowbend, Thomas discovers something strange hanging high in the branches of the old oak tree—a lantern that glows with a mysterious light. When he and his friend Lily climb up to touch it, the lantern bursts with magic, letting them hear the whispers of the world around them: squirrels gossiping, roots humming, and even stars beginning to sing. Together, they promise to keep its secret safe, guarding their “library of voices” hidden in the branches above.