‘Stop standing in the way of bullets.’

‘I will if you will.’

Does the camera ever lie?

1911: After the violent murder of three policemen in the line of duty, tensions between London constabulary and Whitechapel anarchists simmer. Meanwhile accusations and counter accusations of espionage further weaken relations between Germany and Britain. Can Margaret Demeray and Fox find out which potential enemy is behind a threat to the capital before it’s too late?

In the shadow of violence in the East End, just as Dr Margaret Demeray starts to gain recognition for her pathology work, a personal decision puts her career at the hospital under threat. Needing to explore alternative options, she tries working with another female doctor in Glassmakers Lane. But in that genteel street, a new moving-picture studio is the only thing of any interest, and Margaret’s boredom and frustration lead to an obsessive interest in the natural death of a young woman in a town far away.

Meanwhile intelligence agent Fox is trying to establish whether rumours of a major threat to London are linked to known anarchist gangs or someone outside Britain with a different agenda. When another mission fails and he asks Margaret to help find out who provided the false intelligence that led him in the wrong direction, she can’t wait to assist.

But enquiries in wealthy Hampstead and then assaults in Whitechapel backstreets lead unexpectedly back to Glassmakers Lane. How can such a quiet place be important? And is the dead young woman Margaret can't forget a critical link or a coincidental irrelevance?

Margaret and Fox need to work together; but both of them are independent, private and stubborn, and have yet to negotiate the terms of their relationship.

How can Margaret persuade Fox to stop protecting her so that she can ask the questions he can’t? And even if she does, how can they discover is behind the threat to London when it’s not entirely clear what the threat actually is?