Louis Theroux travels to Harlem to spend time with black nationalist groups that mainstream press coverage has branded anti-Semitic, homophobic, misogynist, and racist. He sits in on meetings, sermons, and street-corner lectures, asking the movement's leaders and followers to explain their views on race, religion, and separatism in their own words rather than through the filter of news reports. Theroux's usual method drives the film: he plays the polite, slightly bewildered outsider, pressing gently on contradictions while letting subjects talk themselves into revealing statements. Members describe their reasons for joining, from frustration with white America to a search for pride and structure, and some espouse ideas about Jewish conspiracies and gender roles that the film lets stand unedited. The result is less an argument for or against the movement than a close look at how its rhetoric works on the people inside it, and at the line between righteous anger and something uglier.