Sophie Mannering, editor of the radical magazine "Tell", faces the rare charge of seditious libel. It is alleged she knowingly published an article which urged readers to "kill the pigs". This was distributed at a demonstration which involved violent clashes with the police. Miss Mannering insists the edition found at the demonstration was a fabrication planted by an agent provocateur. She and her colleagues and her supporters admit they are unhappy with what they see as police brutality but assert they deplore violence and would never advocate its use. Unusually Miss Mannering dismisses her counsel Mr. Salter during the trial, arguing that as her publication is "for the people" she should conduct her own defence.