When Tolley goes to live with his great-grandmother he is unsure what life will be like with this unknown relative. He finds a great friend in his great-grandmother, and is delighted to find that children who lived at Green Knowe centuries before come to play with him. When Tolley goes to live with his great-grandmother he is unsure what life will be like with this unknown relative. She becomes a good friend and he is delighted to find that children who lived at Green Knowe centuries before come to play with him.