When a gang of outlaws ambush an army payroll wagon one of the members, Bo, is left for dead after a dynamite charge injures him. As the others make good their escape with the money, Bo is arrested and imprisoned, waiting for the day when he can exact his revenge. Several years later, Bo arrives in Cimarron with a new name and identity, and is hired by Marshall crown as a deputy, unaware that he has false identification papers and is wanted criminal. Equipped with a gun and a badge, Bo wastes no time in tracking down his old friends, who have all made good lives for themselves in Cimarron at his expense. Crown has a coldblooded killer in town and this one has the law on his side.