Although most areas of the Korean film industry have been deregulated in the last decade, a screen quota system remains in place, guaranteeing Korean films between 106 and 146 days a year on each screen in the country. Jack Valenti and the MPAA want to abolish or at least reduce this quota and Korea's film-makers have rallied to defend it.

Choi Jai-Hong's film shows every stage of the campaign, from the initial demonstrations and the hunger strike outside Myungdong Cathedral to the symbolic shaving of heads by directors ­ including the grand old man of Korean cinema, Im Kwon-Taek. Everyone who still believes in cultural diversity should see it.

Tony Rayns