Europe is crumbling. The Xian Flu pandemic and ongoing economic crises have fractured the European Union, the borderless Continent of the Schengen Agreement is a distant memory, and new nations are springing up everywhere, some literally overnight.

For an intelligence officer like Jim, it's a nightmare. Every week or so a friendly power spawns, a new and unknown national entity which may or may not be friendly to England's interests; it's hard to keep on top of it all. But things are about to get worse for Jim. A stabbing on a London bus pitches him into a world where his intelligence service is preparing for war with another universe, and a man has come who may hold the key to unlocking the mystery.