On a train to Berlin in late 1930, William Bradshaw locks eyes with Arthur Norris, an irresistibly comical fellow Englishman wearing a rather obvious wig and nervous about producing his passport at the frontier. So begins a friendship conducted in the seedier quarters of the city, where Norris runs a dubious import-export business and lives in excited fear of his bullying secretary, his creditors, and his dominatrix girlfriend, Anni. As the worldwide...