Freddie Branscombe, recently elected British Prime Minister, ditches his wife in favour of a newer model. He's unaware that his new squeeze, Molly McCloy, is a mole, run by the Democratic Unionist Party of Northern Ireland, to advance their interests as the UK crumbles. The last thing they want is 'checks in the Irish Sea', misinterpreted by a false French tailor as a fashion statement. Molly, now powerfully pregnant, discovers that the DUP's espionage is run by Dame Serena Ridinghard, head of MI6, who, curiously, converses openly with Sergey Susemilh, a Russian 'trade advisor' based poolside in a glamorous resort in Odessa. The British Establishment is hard put to get a grip.