Years before the Great War summoned Bess Crawford to serve as a battlefield nurse, the indomitable heroine spent her childhood in India under the watchful eye of her friend and confidant, the young soldier Simon Brandon. The two formed an inseparable bond on the dangerous Northwest Frontier where her father’s Regiment held the Khyber Pass against all intruders. It was Simon who taught Bess to ride and shoot, escorted her to the bazaars and the Maharani’s Palace, and did his best to keep her out of trouble.

Ian Rutledge returns to his career at Scotland Yard after years fighting in the First World War. Unknown to his colleagues he is still suffering from shell shock, and is burdened with the guilt of having had executed a young soldier on the battlefield for refusing to fight. A jealous colleague has learned of his secret and has managed to have Rutledge assigned to a difficult case which could spell disaster for Rutledge whatever the outcome. A retired officer has been murdered, and Rutledge goes to investigate.

The daughter of a distinguished soldier, Bess Crawford follows in his patriotic footsteps, volunteering to serve her country as a nurse during the Great War. In 1916 she promises Lieutenant Arthur Graham that she will carry his dying request to a brother. When Bess arrives at the Graham house in Kent, Jonathan Graham listens to his brother's last wishes with surprising indifference.

The Great War is still raging when Francesca Hatton’s adored grandfather dies on his estate in England’s isolated Exe Valley. She is his sole heir, for her five cousins are dead now on the battlefields of France. Among his effects, Francesca is stunned to find a letter cursing the Hattons. And at the funeral, a stranger publicly accuses Hatton of murder. Who was her grandfather? The kind man who raised her - or a secretive killer? For in the back garden where she and her cousins once played, there is a white stone they always called the Murder Stone

Kitty Talbot needs a fortune. Or rather, she needs a husband who has a fortune. Left with her father’s massive debts, she has only twelve weeks to save her family from ruin. Kitty has never been one to back down from a challenge, so she leaves home and heads toward the most dangerous battleground in all of England: the London season. Kitty may be neither accomplished nor especially genteel—but she is utterly single-minded; imbued with cunning and ingenuity, she knows that risk is just part of the game.