Two families live in an old house in a small town. Downstairs with his parents, a poor boy and upstairs, the owner's little girl, who sings very well and aspires to become a great singer. The boy adores his little friend and is very proud of her pretty voice. One day the children go to a fair together. The boy buys his friend a gingerbread heart with his hardly saved pennies and gives it to her out of great love. But he cannot yet tell her how much he loves her. He whispers his feelings only to the old willow tree, which is the only one who knows his secret. The years pass and the children become adults…
