A video about Neo-Nazis originating in Sweden provides the starting point of an investigation of extremists' networks in Europe, Russia, and North America. Their propaganda is a message of hatred, war, and segregation.
Louis Theroux travels to California to meet the man dubbed "the most dangerous racist in America"; Tom Metzger. Louis meets him, his family and his publicity manager as well as following him to skinhead rallies and on a visit to Mexico.