Moriarty is back, with the most audacious crime of the century, but is Sherlock Holmes all he claims to be? With the world against them, Sherlock and John lock horns with their old enemy in one final problem. The question is, who will survive?

Two years after the loss of his best friend, Dr John Watson has got on with his life, but with London under threat of a huge terrorist attack, Sherlock Holmes is about to rise from the grave with all the theatricality that comes so naturally to him.

Sherlock struggles to deliver the best man's speech at John and Mary's wedding reception; Sherlock tells the guests about past unsolved cases and inadvertently stumbles upon the identity of the murderer and his next intended victim.

To Sherlock Holmes, Charles Augustus Magnussen is the Napoleon of blackmail - and the one man he truly hates.

Dr John Watson and Sherlock Holmes arrive in 1895, where they face an enemy who appears to be from beyond the grave. They investigate the murder seemingly committed by a ghostly bride.

Sherlock waits to learn where Moriarty will make his posthumous move; Watson and his wife prepare for the birth of their first child.

Estranged from his best friend John Watson, Sherlock seems to have descended into hell as he faces perhaps the most chilling enemy of his career: the powerful Culverton Smith, a man with a very dark secret.

Long buried secrets catch up with Sherlock and Watson. Someone has been playing a very long game and, alone and defenceless, the Baker Street duo face their greatest ever challenge.