Detective James S. Peckman opens his Casebook and takes us into the dark underbelly of a world where true evil exists. Peckman and his partners take the cases that cannot be explained in the mundane world he knew before evil took his wife and daughter from him. Their deaths, "under suspicious circumstances," caused him to leave police work forever. Now, his cases bring him face to face with the demons and monsters most believe exist only in nightmares.