Pinkerton detective Nimrod Dunn is hired by Lieutenant Governor Maddox Kingsley to infiltrate an outlaw gang, but when Nimrod's cover is blown an innocent life is lost in the raging gun battle.
With Nimrod's detective career in tatters, the fearsome US Marshal Jake T. Devine sets about bringing the outlaw Cornelius to justice. Devine always gets his man, but his methods are as brutal as those whom he pursues.
So with Devine's blood-soaked trail making a mockery of the Governor's promise to clean up the county, Maddox calls on Nimrod's services once more. And, to resurrect his career, Nimrod must carry out the most dangerous mission yet: to kill Marshal Devine.