Dr. Thorndyke is asked by a former student to help on his first murder case. A prostitute is murdered and it seemed to be a woman who has killed the lady. Dr. Thorndyke helps find the actual murderer with the evidence available.

After amateur detective Max Carrados ruins the alibi of an Irish militant accused of murder, the man's colleagues plot their revenge. To save his life, a trapped Carrados must find a way to get a message to the outside world - one that even a blind man could understand.

Private detective Horace Dorrington sees no conflict in helping himself while helping his clients. A promising new bicycle company presents him with an opportunity to cash in on his insider knowledge. But it's a dirty business, so Dorrington takes steps to ensure he's not taken for a ride.

Charismatic socialite Simon Carne adopts the persona of 'Klimo' to solve crimes. Does professional jealousy explain antagonism to the celebrated private detective? Or is it something more? And even though Klimo solves case after case for his clients, why are none of the perpetrators ever caught?

A ghost detective named Carnacki investigates the haunting of a country house that threatens the wedding of the homeowner's daughter and her fiance. Carnacki does not suspect supernatural forces are at work in this case, but even a ghostbuster can be wrong.

When a priceless gem comes within grasp, detective Horace Dorrington cuts more than a few corners to get his hands on it. But he battles a surprisingly worthy adversary from an unexpected quarter, one as ruthless and determined as himself.