The existence of a trading post in the Wyoming Territory in 1875, and the people it serves, is threatened by a group of ruthless mountain men led by Asa Rudabaugh and his nephew, Oren. When murder is committed, Cason Macara, the owner of the store and patriarch of the area, sends for the assistance of the law. Together with US Marshal Tom "Tracker" Cord, he embarks on a manhunt to bring the killer to justice and restore peace to the region. Ride with Macara and Cord as they experience two of the most harrowing days of danger and violence in their lives.