A case of blackmail threatens to topple the monarchy itself, but soon
Sherlock and John discover there is even more to it than that. They
find themselves battling international terrorism, rogue CIA agents, and
a secret conspiracy involving the British government.
But this case will cast a longer shadow on their lives than they could
ever imagine, as the great detective begins a long duel of wits with an
antagonist as cold and ruthless and brilliant as himself: Irene Adler. A
Royal scandal, a dazzling game of cat and mouse. The seductive Irene
Adler is cold, calculating, brilliant. Has Sherlock finally met his match?