Expect the unexpected... Girls are being murdered in London, their bodies drained of blood. DI Julian Fleetwood of Scotland Yard leads the investigation, but he has a mystery in his past which might just be connected to the case. Varya Dean, a friend to one of the victims, is the brilliant daughter of a deceased detective, and she knows how to put the pieces of a puzzle together. She also wants justice for the dead girls. The unlikely partnership between Fleet and Varya solidifies as they try to understand why the clues point to a cult around the devil. And then, things that are simply too strange to be natural begin to happen.