The incredible true story of the spy who defied her government to stop a war. In 2003, British intelligence specialist Katharine Gun received a memo with a shocking directive: collect blackmail-worthy information on UN council members to force the vote for the invasion of Iraq. Unable to stand by and watch the world rush into war, Gun makes the decision to leak the memo to the press, igniting an international firestorm that would expose a vast political conspiracy and put Gun in harm's way.