In May, 1911, Holmes and Watson begin a troubling case when two of the 'Baker Street Irregulars' discover a dismembered body in a Gladstone bag which has been washed up at Waterloo Bridge. Holmes finds in the victim's clothes a mysterious code and on examination of the remains, suspects the involvement of a medical man. Watson has a flash of inspiration which takes our pair to Southwark Library where further discoveries are made. As a result of their enquiries, a surgeon and his daughter must try and clear their names. Holmes' solves the case but now must face his own demons, if justice is to be served.