A war hero, invalided home from Afghanistan, meets a strange but charismatic genius who is looking for a flatmate; it is London, 2010, and Dr Watson and Sherlock Holmes are meeting for the first time. A string of impossible suicides has Scotland Yard baffled - and only one man can help.
The government hires Sherlock and John to confiscate something of importance from a mysterious woman, named Irene Adler. But she may be more than Sherlock can handle.
Sherlock faces his biggest challenge of all, delivering a Best Man's speech at John's wedding. But all isn't quite as it seems. Mortal danger stalks the reception, and someone might not make it to the happy couple's first dance.
Sherlock waits to see where Moriarty will make his posthumous move. One mysterious case in particular baffles Scotland Yard - but Sherlock is more interested in a seemingly-trivial detail. Why is someone destroying images of the late Prime Minister Margaret Thatcher? Is there a madman on the loose? Or is there a much darker purpose at work? Something with its roots deep in Mary Watson's past…
Sherlock faces perhaps the most chilling enemy of his long career: the powerful and seemingly unassailable Culverton Smith - a man with a very dark secret indeed.