London, 1798. A junior naval officer at the Admiralty intercepts a coded dispatch: Napoleon Bonaparte is about to launch the largest invasion fleet in history. Target: Unknown. Fearing an assault on England, the Sea Lords need a special officer to uncover the destination of Napoleon's armada-a man who never stops: Marine Lt William John Hazzard. But Hazzard has left the Navy, vowing never to return. The Admiralty, however, knows just how to persuade him. They know where his missing fiancée, Sarah, is...and she's in danger.