1933. Europe is a place of increasing fear and violence. Young British photographer Elena Standish is on assignment in Amalfi when she meets Ian Newton, a charming Englishman with whom she falls in love. But what does she really know about him? Accompanying him on a train across Italy to Paris, she finds him critically stabbed and dying. He tells her he is a member of Britain's Secret Service, on his way to Berlin to warn MI6 so that they can foil a plot to assassinate one of Hitler's vilest henchmen and blame Britain for it, thus causing a devastating diplomatic crisis. Elena promises to deliver the message. But she is too late, and finds herself fleeing for her life.