Jim Slade (Peter Lee Lawrence) is imprisoned by the Army for his refusal to kill anyone during wartime, citing religious reasons for his refusal. The Civil War ends, and he is pardoned. Jim returns home to his parents' ranch in Tucson, Arizona and comes home to find his parents murdered. Jim abandons his religious pacificism to exact revenge upon his parents’ murderers. He buys a pistol and quickly learns to use it. Four bandits were witnessed at his parents’ ranch, and Slade sets out to find them.
Unfortunately, the energy created during the first act cannot be sustained. Jim has little information on the fourth bandit, as he only knows his last name, “Corbett,” and the state where he last seen, “Texas.” He moves through the counties and checks the local bounty boards. During one afternoon, he rides into a sleepy town and stops in the saloon. He meets a traveling preacher, like Slade also fast with his gun, named Douglass (John Ireland). Soon after introductions, the town is under siege by a group of bandits who attempt to rob the local bank. The bandits are positive that two-hundred thousand dollars are located on the premises. No money is found and the bandits retreat, not before killing the local sheriff. The mayor of the town offers Slade and Douglass five thousand dollars each to stay and protect the town. Slade refuses but accepts the deal when he learns that the bandit leader is none other than Corbett (Piero Lulli), the final man upon whom Slade wants to exact revenge.