Buying a goat at a fair leads to a chain of enormously exciting adventures, even by the standards of Bunkle, the youngest of the de Salis children. Exploring a mysterious empty house, meeting a Russian princess, being trapped on a perilous rooftop and foiling a gang of kidnappers are amongst them. It is of no surprise to his readers that Bunkle does indeed 'bring it off' and whilst saving the day also helps Colonel de Salis in his vital work for the Secret Service.