Archibald Sinclair Cholmondeley (pronounced Chumly), the glib-tongued and picaresque, street-wise youth, who first appeared in Memoirs of an Errant Youth, is caught out at last - called up for National Service. He chose the Royal Air Force in which to serve his time, because old soldiers had told him, 'There's less 'bull' in the 'Brylcreem Boys Brigade' and blue had always been his favourite colour.' He still doesn't miss an opportunity to make a bit of cash on the side. He is the bane of his superior officers, challenges authority and gets into scrapes, but always manages to talk his way out of trouble. Finally, to everyone's surprise, he proves his worth and makes the grade.