Sean Kilpatrick (Richard Harris), a pacifist border-town sheriff, has used some unconventional methods to keep order in his tiny Texas town. But Kilpatrick's belief system is rocked when the villainous Frank Brand (Rod Taylor) and his gang murder Kilpatrick's family following a bank robbery that goes wrong. An enraged Kilpatrick trails the gang into Mexico, where he partners with local police officer Gutierrez (Al Lettieri) to bring down Brand once and for all.