A train is robbed by masked robbers on its way to the gold-mining region of the Rocky Mountains and a man is murdered ruthlessly in the process. Our hero who is the sole witness of the crime suffers a terrible brain fever and loses his memory including, the name of the murderer. But as fate would have it, the murderer is the leader of the gang but pretends to be a law-abiding citizen of the same town where our hero now lives with a new name and new identity. Will the murder be ever discovered? And will the justice be served in this hostile region?