London, 1888.

The study at 221b Baker Street, NW1

A weak man in thrall to a dangerous woman. Sherlock Holmes  hatches a plan to save the reputation of one of the crowned heads of Europe.  But is he on the right side? The weak man is revealed to be a foolish King and as for the dangerous woman... Well, she turns out to be not just a woman but... the woman. 

The question is, will Holmes ever be the same again?