February 1942. The Blitz has devastated London. Air raids and unexploded bombs continue to plague her battered-but-unbowed citizens. Then, in the midst of an unsettling lull, a new and yet familiar horror descends - a modern day Jack the Ripper stalks the city not under a blanket of fog, but in the protection of nightly Blitz blackouts...

Mrs. Mallowan - also known as England's First Lady of Crime, Agatha Christie - is doing her bit for the war effort, working in a hospital by day. But she believes she can help even more by assisting renowned pathologist Sir Bernard Spilsbury in his investigation of the Ripper-inspired killings. But her experience in all matters murder comes from the novels she pens - and may not be enough to prepare her to face the real thing...