Set between Kansas and Saskatchewan in 1907, a young boy gets separated from his family en route to Canada and must find his way alone across the immense prairie landscape. Following the sudden death of his eldest brother, twelve-year-old Peter is chosen by his father to travel by train from Kansas to Saskatchewan to help set up the new family homestead. But when Peter's boxcar becomes uncoupled from the rest of the train somewhere in South Dakota, he finds himself lost and alone on the vast prairie. For a sheltered boy who has only read about adventures in books, Peter is both thrilled and terrified by the journey ahead.