On 20 February 2016, then-Prime Minister David Cameron officially set the date for the British public’s vote on whether to remain a member of the European Union. What followed was months of campaigning, debate, claims, and a political drama fought out in the press which resulted in the resignation of David Cameron and the subsequent Conservative leadership contest. But what did the British public not witness? During this historic political event BBC Two had exclusive behind-the-scenes access to document every twist and turn of the Leave campaign and the race for the Conservative leadership that followed. Filmed from the early days until the extraordinary events after the vote the unseen footage lays bare the ambition, passion, strategy and animosity that existed and propelled the Leave campaign. This is the real story of the campaign for Brexit as told by a host of key people as they lived and breathed it. The programme features a range of senior politicians and campaigners including Boris Johnson, Iain Duncan Smith, Nigel Farage and Matthew Elliott, as well as Remain campaigners Lord Heseltine, Alan Duncan and Will Straw.