On a dark night, a famous archeologist arrives home in London only to fall dead when affronted by a mysterious robed figure. The game is afoot. It falls to Sherlock Holmes and Doctor Watson to unravel the mystery unlike anything they’ve encountered before. A case of a secret cult and an ancient god. They must sift through eldritch dreams, strange odysseys, prehistoric myths and primordial beings, if they hope to put an end to the brutal killings.