A Locked Room
A Dead Body
A Man Wielding A Knife
When Sherlock's brother is discovered holding a knife and leaning over a corpse, it seems a clear-cut case of murder. But Sherlock isn't so sure.
In a mystery that will take him from London to Moscow in a thrilling search for clues, can Sherlock deduce the truth and discover the real culprit... or will Mycroft hang?