When Mrs. Oleson meets Hester-Sue Terhune she is very disappointed to discover she is black. Hester-Sue has bought black children to join the rest of the blind school and they all continue the journey onwards to Walnut Grove. In the end it takes the words of a little blind black boy to teach her that prejudice is wrong, and Harriet comes to a crossroads in her life, whilst Adam will have to face his deepest fear as he comes to a crossing of his own.