Jacob Portman always thought that his grandfather was embellishing tales about the time he spent in a Wales orphanage during WWII in order to frighten him; the photographs he showed him of children with strange characteristics could not possibly be real. But when Jacob's grandfather is murdered and Jacob swears he sees a horrible monster lurking nearby, he decides to investigate his grandfather's past in the hopes of discovering the eery circumstances of his death.

Maisie Dobbs has a truly impressive history: housemaid, Cambridge student, wartime nurse and now, a private detective. With help from her former employer, Lady Rowan, Maisie's natural ambition, intelligence and empathy aid her in solving some complex mysteries.

The murders of three Christian children are being blamed on the innocent Jews of 12th century Cambridge, England in the first installment of this historical mystery series. In order to clear their name, King Henry calls for an expert, a master of the art of death, to determine who is really to blame. Instead, he gets a mistress, Adelia Aguilar, a trained physician from Salerno, Italy. She is talented, stubborn and on a dangerous mission to discover the real killer, who is still roaming Cambridge, perhaps under her very nose.