Arriving in the wilderness of London and in need of lodgings, Dr John Watson finds himself living at 221b Baker Street with one Sherlock Holmes. When a corpse is discovered in a derelict house Watston, fascinated by his brilliant, eccentric companion, is soon drawn into Holmes' investigations. There's no sign of a struggle, no wounds on the body, yet scrawled in blood across the walls is the word RACHE - revenge. Watson is baffled but for Holmes the game is afoot...