Iris and her grandfather went for a walk in the country, where Iris complained that there were no children. However, her grandfather assured her there must be some children somewhere. As they walked, they came upon a large green tree. Iris climbed the tree and discovered a house at the top, where she met a boy named Walter. Iris and Walter became friends and played together every day, enjoying activities like climbing trees, playing hide and seek, and riding Walter's pony. Though Iris still missed her home in the city, she was happy to have found a new friend in the country.