Johanna lives with her grandmother, Sarah, and doesn't go to school. She has a job everyday pushing a barrow-load of potatoes around the town, delivering them to her grandmother's customers. She works like a donkey and the Owen children treat her like one. But do they have the right to be so superior? Johanna is aware of a lot of whispering about her parentage and becomes determined to find out who her father really is. She starts to investigate but is unprepared for a shocking discovery.