New Year 1924.
But when.
Mary and Sherlock embark on a search for the missing operative, which takes them on a perilous journey through sun-drenched India.
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 Russell is drawn into a new intrigue when she and her husband, Sherlock Holmes, pay a visit to Holmes\' gravely ill brother, Mycroft.
New Year 1924