Synopsis: Wild Bill Hickok, Union Army hero and personal scout for General Ulysses Grant, is now working as a U.S. Deputy Marshal. Hickok's latest investigation takes him to the small town of Milton, New Mexico to see why large shipments of cattle purchased by his army buddy, Steve Norris, have been mysteriously disappearing during cattle drives. Wild Bill picks up the trail of the missing herds with help from his old friend "Whiney" Roberts and discovers a canyon where the cattle are hidden. Under the cover of night, he tracks down the deadly gang of rustlers, who are led by the ruthless "One Shot" Folsom. Hickok and Roberts must now rely on their frontier bravado and their skill with a revolver to bring the merciless band of thieves to justice.