Hugh ‘Bulldog’ Drummond is a World War I veteran, brutalised by his experiences in the trenches and bored with his post-war lifestyle. He publishes an advertisement looking for adventure, and soon finds himself embroiled in a series of exploits, many of which involve Carl Peterson—who becomes his nemesis—and Peterson’s mistress, the femme fatale, Irma. ‘Sapper’ —the pseudonym of H. C. Mc Neile—wrote ten Drummond novels, four short stories, four stage plays, and a screenplay before his death in 1937.