Michael Byrne is an Irish Don Juan - a composer, a charmer, a bigamist and a thug. He moves from country to country, from bed to bed, selling his talents and leaving a trail of children in his wake. His journey takes him from post-Great War London to the centre of Hitler's Third Reich and then he vanishes. His twin sons travel across the troubled face of Europe to pursue their father for one final apocalyptic reckoning.