Apron Lane er en lille del af London, hvor tiden er gået i stå. Kriminaliteten udfolder sig frit og uhindret i området i en grad, så "Going up Apron" er kommet til at betyde, at man bevæger sig på kant med loven. Den excentriske Palinode-familie har i årevis styret Apron, og selvom deres formue er tabt, fører de sig stadig frem som lokale herremænd. Området er som en tidslomme og kunne minde om noget fra Dickens, og havde det ikke lige været for det forhold, at Palinode-familien har arvet nogle aktier, som først anses som værdiløse, kunne hele sceneriet betragtes som en morsom anakronisme. Men en bankmand sætter en ondsindet plan i gang for at komme Palinode-familien til livs og få fingre i aktierne. Albert Campion må træde til og rydde op i Apron Lane.
Margery Louise Allingham was born in Ealing, London in 1904 to a family of writers. Her father, Herbert John Allingham, was editor of The Christian Globe and The New London Journal, while her mother wrote stories for women's magazines as Emmie Allingham. Margery's aunt, Maud Hughes, also ran a magazine. Margery earned her first fee at the age of eight, for a story printed in her aunt's magazine.
Soon after Margery's birth, the family left London for Essex. She returned to London in 1920 to attend the Regent Street Polytechnic (now the University of Westminster), and met her future husband, Philip Youngman Carter. They married in 1928. He was her collaborator and designed the cover jackets for many of her books.
Margery's breakthrough came 1929 with the publication of her second novel, The Crime at Black Dudley. The novel introduced Albert Campion, although only as a minor character. After pressure from her American publishers, Margery brought Campion back for Mystery Mile and continued to use Campion as a character throughout her career.
After a battle with breast cancer, Margery died in 1966. Her husband finished her last novel, A Cargo of Eagles at her request, and published it in 1968.