A chance romance between two men from very different worlds, one from the headquarters of the Secret Intelligence Service, the other from a world of clubbing and youthful excess, leads into mystery after one of them suddenly disappears.

In June 2016, Britain voted to leave the European Union. In the hastily-established Department for Exiting the EU, newly-promoted Clive Everard finds himself in charge of delivering Brexit. The most complicated divorce in history has begun.