July, 1940. The Nazis launch their invasion of Britain - starting with the Channel Islands... And soldier turned safecracker Bill O'Hagan gets an offer: hang for his crimes, or serve his country. The mission - land on occupied Alderney, impersonate a local, steal the invasion plans, escape. He almost believes they're not lying to him. In Portugal, the former King, Edward, Duke of Windsor, receives an altogether different proposal from Germany: ease the invasion and he'll get his throne back. But Edward will not readily betray his country... An embittered former king. An unreformed thief. And a secret upon which the fates of nations lie...