A Day of Fury (1956)

A Day Of Fury stars Jock Mahoney as town marshal Alan Burnett, whose life is saved by a stranger he meets on the trail. His rescuer turns out to be Jagade (Dale Robertson), a gunslinger just returned after years away, who finds when he gets into town that he can't abide the peace that has been settled between "his" people (i.e. the saloon-keepers, gamblers, etc.) and the righteous, "respectable" folk. Jagade stirs up trouble by persuading the saloon owners to open on Sunday, which they'd voluntarily stopped doing years ago. Suddenly, the peace that had settled over the town is broken, and gambling and other vices that had been in check rise anew, drawing in many of the respectable townsmen and women in the process -- some of the men can't resist the lure of a good high-stakes poker game or a pretty woman, and even the spinster schoolteacher finds herself drawn to Jagade's dark charisma. An escalating cycle of vice and violence unfolds in barely 24 hours; Burnett won't back Jagade down, partly because the man has broken no laws and also partly due to his gratitude to the gunman for saving his life. None of the townspeople can comprehend his inaction, however, and this soon jeopardizes not only his job as marshal and his safety, but also the well-being of his fiancée, Sharmon Fulton (Mara Corday), who was a saloon girl before she was brought out of that life and given a home with a respectable family. Soon Jagade loses control of what he's started, and the town begins to destroy itself in a cycle of guilt, anger, betrayal, murder, suicide, and lynch law.
~ Bruce Eder, Rovi