Missing: Mr Jeremiah Hayling, aged 26, a hydraulic engineer. He left his house at ten o'clock at night on the 9th of this month, and has not been heard of since.
When Watson's latest patient confronts him with a missing thumb and a horrifying story, he knows just where to turn. This is a case for Sherlock Holmes. But, can Holmes and Watson unravel this deadly mystery in time to catch the criminals?