Anna Kronberg

London, 1885. Anna Kronberg hides in the city's most notorious slum, offering medical treatment to prostitutes, beggars, and criminals of all kinds. None of her neighbors knows her true identity, and she makes sure it stays that way. When the Irish thief Garret O'Hare breaks into her home in the dead of the night, bleeding profusely from a gunshot wound and collapsing on her bed, her life begins to take a deadly turn.

In Victorian London's cesspool of crime and disease, a series of murders remains undiscovered until a cholera victim is found floating in the city's drinking water supply. Dr. Anton Kronberg, England's best bacteriologist, is called upon to investigate and finds evidence of abduction and medical maltreatment. While Scotland Yard has little interest in pursuing the case, Kronberg pushes on and crosses paths with Sherlock Holmes.

Eluding Scotland Yard and Sherlock Holmes, Anna Kronberg leads an inconspicuous life far from London. Until the day she wakes up to a gun pressed against her temple. With her father held hostage and no help in sight, Anna finds only one way out - to take her captor for a dance along the razor's edge while delving into Britain's tentative beginnings of espionage and systematic biological warfare.

With her darkest nightmare come true and an assassin following her every step, Anna Kronberg must hurry to find the true motivation behind Moriarty's plan to use disease as a weapon. Bit by bit, she and Sherlock Holmes unravel a spider web of crime, espionage, and bioterrorism that spreads across continents.