It is early 1916 and the world is at war. Sherlock Holmes is well into
his spy persona as Altamont following the capture of the German spy Von
Bork at the opening of the Great War. Watson is called to London by
Mycroft Holmes and is asked to join Sherlock, who has infiltrated the
Irish Volunteers. War within the United Kingdom could deal a decisive
blow to the war effort and Holmes must find out the rebels' plans, and
if possible, stop the rebellion which appears imminent. He has need of
Watson once again.