Time is late 1800's to early 1900's. Angus McCaskil and Rob Barclay immigrate from Scotland to America. In Montana, they search for Lucas Barclay, Rob's uncle who has sent 100.00 each Xmas. Angust marries Rob's sister after losing Anna Ramsay to Isaac Reese. McCaskill son and Reese daughter will be the mother and father in English Creek. US Forest Service is starting to regulate grazing in the mountains. Susan Duff, student of Angus (he is teacher as well as sheep rancher) will be heroine of Prairie Nocturne.