Following the disastrous retreat of the British army from Dunkirk in 1940, England is plunged into a state of fear. The threat of a German invasion is real, and many German Nationals are interned in camps across the country. One such camp is on the ancient moor land of Prees Heath, near the small town of Whitchurch in Shropshire, where Tom Tyler is the sole detective inspector. Young women from all walks of life have joined the Land Army, to help desperate farmers keep the country fed. Then one turns up dead.

In his forties, the Reverend Charles Howard still cut an impressive figure. A married Presbyterian minister in Toronto’s east end, Howard was popular with the congregation that elected him, especially with the ladies, and most particularly with Miss Sarah Dignam. Respected in the community, Howard, as Visitor for the House of Industry, sat in judgment on the poor, assessing their applications for the workhouse. But now Howard is dead, stabbed and brutally beaten by someone he invited into his office.

November, 1940. Tom Tyler, Detective Inspector of the small Shropshire town of Whitchurch, is a troubled man. The preceding summer had been a dark one for Britain, and even darker for Tom's own family and personal life. So he jumps at the opportunity to help out in the nearby city of Birmingham, where an explosion in a munitions factory has killed or badly injured several of the young women who have taken on dangerous work in support of the war effort.

It's summer, 1942, and after a tough couple of years, DI Tom Tyler is making a fresh start in Ludlow, Shropshire. On the outskirts of town, St. Anne's Convalescent Hospital, staffed by nursing sisters who are Anglican nuns, has been established in an old manor house to help victims of the war to recover. After a horrifying double murder is discovered on the grounds, Tyler must figure out how the crime could have occurred in such a secluded and presumably impenetrable place.

This ambitious, electrifying work traces the harrowing journey of the famed Sarajevo Haggadah, a beautifully illuminated Hebrew manuscript created in 15th-century Spain.

When it falls to Hanna Heath, an Australian rare-book expert, to conserve this priceless work, the series of tiny artifacts she discovers in its ancient binding - an insect wing fragment, wine stains, salt crystals, a white hair - only begin to unlock its deep mysteries.