Humphrey Bogart gives an outstanding performance as factory laborer Frank Taylor, who loses a promotion to a foreign-born coworker. Filled with hatred, Taylor joins the Black Legion, a secret white supremacist organization. The group burns down the barn of Taylor's coworker, scaring him out of town. Thus, Taylor receives the promotion. But when Taylor is forced to spend his time recruiting new members for the Legion, he is demoted from plant foreman back to factory laborer. The Legion attacks Taylor's new boss, making friends suspect Taylor's involvement, while Taylor himself begins drinking heavily in a fit of self-loathing. When Taylor finally loses his job and the Legion gears up for an attack on a former friend, it appears that Taylor has hit rock bottom--with only himself to blame. This fast-paced, black and white tale of moral decay and redemption is based on the true story of the Black Legion's condemnable actions in Michigan in the 1930s.