Based on actual events, Official Secrets tells the remarkable story of Katharine Gun and her effort to stop an illegal war.
In 2003 at her job as a British intelligence specialist, Gun (Keira Knightley) comes across a disturbing email from the US National Security Agency division chief: a request for UK assistance in blackmailing members of the United Nations Security Council into endorsing an invasion of Iraq. Shocked, she makes a decision that will change her life and put her family in danger.