The British Prime Minister and the American President have decided to fight another war, only this one will much quicker (promise)!

The idea to go to war does not go down well with US General Miller (James Gandolfini) and UK Secretary of State for International Development, Simon Foster (Tom Hollander). However, when Simon accidently backs the war on live TV, he finds he has a lot of friends in Washington DC.

Simon and his one-man strong entourage in the form of Toby (Chris Addison) have to try and prevent the country going to war again. This involves Toby sleeping with an intern (Anna Chlumsky), and preventing the PM's chief strategist from rigging a UN vote. The last of these tasks will be particularly difficult, as the chief strategist is none other than the most foul-mouthed Scotsman in politics - Malcolm Tucker (Peter Capaldi).