When a mysterious masked man appears at 221B Baker Street with a delicate problem, Holmes finds himself suddenly drawn into a web of international intrigue.
At the centre of the whole affair lies Irene Adler: opera singer, adventuress, and one of Sherlock鈥檚 most worthy opponents.
Will Holmes catch Adler before she uses a compromising photograph to topple one of Europe鈥檚 most powerful monarchies? Or has the great detective finally met his match?

A Noiser podcast production.

Narrated by Hugh Bonneville
Written by Sir Arthur Conan Doyle
Produced by Katrina Hughes and Addison Nugent
Sound Design and Audio Editing by Josh Latham
Compositions: Dorry Macaulay and Oliver Baines
Mix & Mastering: Liam Cameron
Series Consultant: Dan Smith