The title refers to a particular Native reservation in Wyoming.

Rating: Null/10 (25 December 2017)

My wife and I watched this at home on DVD from our public library. It is not an entertaining movie, the subject is too serious for that, but it is a well-made and worthwhile movie.
At the beginning we see a young woman running barefoot in the snow, we can tell from her actions that she isn't out for a nighttime run. She is fleeing a dangerous situation and in fact she later is found dead, frozen in the cold weather.
Jeremy Renner is Cory Lambert, he works for a wildlife department, he helps keep predators from killing livestock. We witness that he has a very capable long-range rifle. He discovers the dead girl of 17 or 18. It hits him hard, he had lost a daughter not many years earlier.
Elizabeth Olsen is FBI agent Jane Banner. She was dispatched to the location only because she was available and reasonably near by, but totally unprepared for the weather and the situation. But she, along with Cory, becomes the key to getting to the bottom of the murder.
The movie was made to dramatize a situation with young Native American females who regularly go missing, some are discovered murdered as is depicted here, some just vanish and are never accounted for.