At the dawn of the 20th century, following their father's arrest on suspicion of betraying state secrets, the three Waterbury children—Bobbie, Phyllis and Peter—move with their mother to Yorkshire, where they find themselves involved in unexpected dramas along the railway by their new home.

Follow a group of children who are evacuated to a Yorkshire village during the Second World War, where they encounter a young soldier who, like them, is far away from home.