 In 1846, northern Kansas was being terrorized by soujtern sympathizers known as Copperheads, and gambler Frank Graham(Bill Elliott as "Wild Bill  Elliott) goes to Junction City seeking the killer or killers of his father. He gets little help from Union Army officers Colonel Barnes (Ray Walker) or Captain Ramsey (Robert Kent), but gets a job at the freight line co-owned by Jane Dudley (Marjorie Lord) and his late father. Jane tells him his father was stabbed in a quarrel over counterfeit money given to him for his freight interests. Frank learns that Hardy (Henry Rowland), a printer; Temple (Keith Richards), a store owner; Perry (I. Stanford Jolley),a peddler; Greely (Denver Pyle), a gambler, and Spain (Otto Waldis), a jeweler, are Copperheads and one of them murdered his father.