London 1901. The city is in the grip of "monkey man mania". Intrepid explorer Drake Patterson has caused a media storm following his astonishing discovery of a frozen ancient man in the remote Himalayan Mountains. This primal man has been triumphantly transported back to England as proof of the missing link in evolutionary theory. The upcoming auction of the specimen causes a stir amongst academics and the board of the British Museum.
Winter, 1890. A deep freeze has fallen upon London, and its citizens remain huddled indoors. But the cogs of the criminal underworld never stop turning, and Holmes and Watson find themselves embroiled in a crime that rocks the art world.