Johnny goes to Casper to testify at Pete Bole's trial. Pete's gang hired Heracles Snead to break him out of jail. A young girl, Little Britches, thinks she is in love with Pete. Snead needs to get rid of Little Briches so he takes her out of town and strands her without a horse. As she walks back to Casper, she is found by Johnny. When she learns who he is, she knocks Johnny out and handcuffs him to a tree. When Snead learns what she did, he sends her back for Johnny to prevent the Sheriff from suspecting anything. Snead uses a cattle stampede through town to break Pete out but Johnny spots the escape and kills Pete. Little Britches learns she is not hurt as she expected. At the end she arrives in Laramie looking for Johnny who rides for his life when he sees her.