US Marshal Gid McCool leads a wagon train of convicted felons to Huntsville prison. The only female among the crooks is the dancehall girl Laura Mannon, McCool's former flame. When McCool cannot be swayed from completing his lawful duty, Laura tries to endear herself to shotgun rider Mike Reno in hopes he will set her free.

"A wagonload of condemned criminals on his hands...a gang of desperadoes on his trail!"