But Maisie senses something is wrong. Soldiers are disappearing into The Retreat, signing over their fortunes, and never coming out. Her mentor Maurice warns her to stay away.
With her assistant, *Billy Beale* (also a former soldier), Maisie goes undercover to The Retreat. She must confront not only a crime - a place exploiting broken men - but also the ghost that has haunted her since France: her own trauma as a war nurse surrounded by shell-shocked men.
*Theme:*
It's not just a mystery. It's about class in England - how a girl from service could become educated, about the hidden wounds of WWI that England tried to bury, and about how the Great War destroyed a whole generation of men who came home but never really came home.