When Randy Post, a young cowboy riding for the Rancho Diablo brand, gets accused of murdering a saloon girl, Sam Blaylock saddles up to get to the bottom of the matter before they fit him for a hangman's noose. Sam doesn't know that the murder has set off a chain of events that will end up with him swapping lead with a murderous gang of robbers eyeing one of the banks in Shooter's Cross. In the past, Marshal Everett Tolliver and Sam Blaylock haven't seen exactly eye-to-eye on things involving the ranch hands. Tolliver intends to hold the peace in town no matter what the cost. But he's going to need help if he's going to find out who murdered Jessie Holden in cold blood. Even after they've set there differences aside for the time being, Sam and Tolliver still have to put their lives at risk to hold the line in Shooter's Cross in a gundown on Main Street that will become a legend.