It is 1910, and a widowed Dr. Watson moves back to Baker Street to discover that age has done nothing to dim his old friend's thirst for mystery and deduction.
One morning, Watson returns from a client to find Holmes in a bright mood - the reason? Holmes and Watson have been invited to the farewell concert of celebrated former prima donna of the Warsaw Opera - Irene Adler. The woman requests their presence!
What happens when Holmes meets his one female equal 20 years after their first curious meeting, which Watson described in A Scandal in Bohemia?