Gunfire stars bantam-weight western favorite Don Barry as legendary outlaw Frank James. Actually, Frank is an ex-outlaw when the film begins; in fact, he's sworn never to use his guns again. But when somebody begins posing as Frank and pulling off a series of robberies....well, what's a man to do? Helping Frank prove his innocence is sympathetic marshal Kelly (Robert Lowery), who gives James plenty of leeway to capture the genuine miscreants.