Miss Irene Adler, the beautiful American opera singer who once outwitted Sherlock Holmes, is here given an unexpected talent: she is a superb detective, as Oscar Wilde and Bram Stoker can attest. But in matters of the heart she encounters difficulty.

The Crown Prince of Bohemia, tall, blond, and handsome, proves to be a cad. Will dashing barrister Godfrey Norton prove that Irene is not immune to love?

And who will win her duel of wits with the great Sherlock Holmes himself?