George Abbershaw has been invited to a party at the gloomy old English mansion of a friend, along with a few people he knows, a few he doesn’t, and one he is sweet on. A suspicious death means George has to determine who can be trusted and who can’t, including a bespectacled young man named Albert Campion who seems to have shown up at the party uninvited. When things take a decided turn for the worse, George and the rest of the guests have to band together in an effort to extricate themselves from an increasingly perilous situation.

Although only a supporting player here, Albert Campion would be the protagonist of another sixteen novels and over twenty short stories, contributing to Margery Allingham being considered one of the four “Queens of Crime,” along with Agatha Christie , Dorothy Sayers , and Ngaio Marsh.