When three bodies are discovered in Big Horn County, Montana, an area known as the most dangerous place in the country for Native American women, local authorities first ignore each death before ruling them accidental - leaving the victims' loved ones to deal both with their loss and the indifference of local law enforcement. As sorrow turns to outrage, however, a vibrant and fearless movement is formed to search for the truth and bring attention to the thousands of missing or murdered cases among Native peoples in the US.