Dr. Arthur Conan Doyle and his mentor Dr. Joseph Bell investigate the case of a woman who believes she's being followed by an apparition while bicycling along a lonely road.

Dr. Arthur Conan Doyle and his mentor Dr. Joseph Bell investigate the strangulation deaths of two persons found floating in the river, as Doyle finds himself captivated by spiritualism.

A museum curator hires two professors (one being Dr. Joseph Bell) to publicly unwrap an Egyptian mummy, but it proves to be a man's three-week-old corpse.