New Year 1924 Mary Russell is drawn into a new intrigue when she & her husband Sherlock Holmes pay a visit to Holmes' gravely ill brother Mycroft Mycroft has received a strange package that contains the papers of a missing English spy named Kimball O' Hara the hero of Rudyard Kipling's Kim who is feared to have been taken hostage
- or even killed Mary & Sherlock embark on a search for the missing operative which takes them on a perilous journey through sun-drenched India But when a twist of fate forces the couple to part ways Russell learns that in this faraway place it's often impossible to tell friend from foe & that some games must be played out until their deadly end