Helen Steel and Dave Morris are two London activists handing out a leaflet titled "What's Wrong With McDonald's" when the company sues them for libel in 1990, setting off the longest trial in English legal history. Neither can afford a lawyer, so they represent themselves against a corporation with a full legal team, spending years in the London courtroom cross-examining McDonald's executives on wages, packaging waste, and the nutritional content of a Big Mac. The film follows the case through eleven years of hearings, using courtroom reconstructions, news footage, and interviews with Steel and Morris themselves as they research their own defense from scratch. What was meant to silence two critics turns into a public relations disaster, as the trial drags McDonald's practices through years of press coverage the company never wanted. The verdict, when it comes, satisfies no one completely: the judge finds parts of the leaflet libelous but rules other claims true, leaving both sides able to claim a partial win.