Reprisal!

Frank Madden (Guy Madison), who is part Native American but passes as white, purchases a ranch in the small town of Kendall, Okla. When Frank moves in, he finds that the bigoted townspeople have recently let three brothers, who are also his neighbors, get away with the lynching murder of innocent Native Americans. As tensions between the townspeople and local Native Americans rise, Hank becomes torn between fighting against injustice and keeping his true identity a secret.