The year is 1913. The disgraced and formerly penniless aristocrat Sir Everard Dominey returns from German East Africa a reformed and wealthy man determined to take his place in English society. But is he Sir Everard or the German spy, Baron Leopold von Ragastein?
Leopold, educated at Eton and Oxford with the Englishman, bears a striking resemblance to Dominey and was often taken as his double at school. After a chance encounter in Africa, one of them has returned. But who?