A macabre discovery in the cloisters of Westminster Abbey.

Augusta Peel is puzzled by a mysterious customer in her bookshop. But when the encounter leads to an attack in the abbey cloisters, she finds herself entangled in a murder investigation. Who is the mystery customer? And why did he give a false name?

Obscure information imparted on a death bed forces Augusta and Scotland Yard detective Philip Fisher to follow a trail of clues. It's not long before they're pulled into the shadow of an event everyone would rather forget: the Great War.

When the murderer strikes again, Augusta and Philip are forced to rethink their investigation. But just as they're making progress, Philip makes a decision which changes everything...