It is August 1914 and war has been declared. Spymaster Fitzroy returns from France with a team of highly trained spotters wounded and unfit for duty. While Euphemia's husband, Bertram, is away undertaking Fitzroy's next mission, Euphemia and Merry go undercover as nurses in the hospital where Fitzroy's four surviving scouts are being treated. It is feared one of them is a traitor and Euphemia must identify him before it is too late...
At the hospital, Euphemia encounters a black-market racketeer, the impenetrable high security Ward D, and an old familiar face who believes some deaths on his ward are a result of foul play. Uncovering far more than she'd bargained for, Euphemia will need all her strength, wit and ingenuity to survive unscathed ...