Morgan Hunter-Brown is 'Railway Joe', employed by Interpol to investigate smuggling and financial espionage in cold-war Europe. Alone as always at Christmas, he's the agent called up for a chase that will lead him north to Germany, 'home' to London, finally back to his one-time, wartime motherland in Italy. Manipulated by his Controlleur and falling in love with every pretty face he sees, every soft voice he hears, Morgan is equally at the mercy of events, enemies and his own emotions...