At the Wyoming Wind River Reservation, Arapahos meet for their powwow when their tribal chairman, Henry Castle, is discovered, murdered.
Henry's nephew is the leading suspect but Fr. John O'Mally, S.J. doesn't think so. O'Mally is the parish priest and thinks that the reason could have something to do with oil on the reservation. Here had been an argument about buying back the Coley ranch where there might be additional oil which could help the financial plight of the Indians and O'Mally checks into that.
He finds in historical documents that the Arapahos had something to do with this land many years ago.
The story mixes drama, history, and romance mixed with the pathos of life on the reservation. O'Mally is a recovering alcoholic and I found him a bit of a blunderer but still enjoyed the story and recommend it, particularly to those interested in American Indian History.