In this novel, Dr. Watson meets his future wife, Mary Morstan, who urges Sherlock Holmes to search for her missing father.
Every year she receives a jewel in a mysterious way, and it all traces its origin to a dark story of murder and betrayal from the time of the great rebellion in India.
These few stories belong to the collection "The Return of Sherlock Holmes", which the author wrote at the request of the audience disappointed by the "death" of the hero in the Swiss hills from the collection "Memoirs of Sherlock Holmes".