Dakota Lil plot
The US Treasury Department sends their secret agent Tom Horn to the West to expose a gang of train robbers. $100,000 worth of unsigned banknotes was stolen in a train robbery. Tom begins to gain the trust of Lil, the local singer and counterfeiter, and her friend Vincent. Horn gets both of them to provide him with information about the train robbers and learns that saloon owner Harve Logan was in charge of the train robbery. Lil leaves Vincent for Logan and she also tells him about Tom's activities. Logan can really use Lil's counterfeiting expertise. But then Lil finds out she's actually in love with Tom and leaves Logan again. With Lil's help, Tom tries to find Logan and eventually arrest him.