Dance hall gal Lil (Marie Windsor) is a very fine woman - she can sing, she can ride, she plays cards and she knows how to forge - all of which make her attractive to several gentlemen, including secret service agent Tom Horn (George Montgomery). Horn's been sent West to round up a gang of counterfeiters. He starts by gaining the confidence of one of the ringleaders, Lil, and she leads him to Logan (Rod Cameron), the brains behind the operation. When Lil finds out that Horn is a Fed, she's tempted to fill him full of holes. The only problem is, he's taken her heart.