\When children go missing from London's Foundling Hospital, and one of the nurses is murdered, Kat cannot turn away the appeal to investigate. She enlists the help of the charming and enigmatic Daniel McAdam, and Errol Fielding, a disreputable man from Daniel’s troubled past, to bring the killer to justice. Their investigation takes them from the grandeur of Mayfair to the slums of the East End, during which Kat learns more about Daniel and his circumstances than she ever could have imagined.