The film tells the story of the tiny prairie town of Leith, North Dakota, which saw its population of 24 grow by one. The newcomer was Craig Cobb, a notorious white supremacist. Quietly snapping up plots of land, he planned to take over the town government and establish Cobbsville, a haven for white separatists. In organizing a rally of supremacists and neo-Nazis and courting them to take up residence, Cobb does not endear himself to Leith. As his behaviour becomes more threatening, tensions soar, and the residents desperately look for ways to expel their unwanted neighbour.