Ten years after the mysterious death of Jessica Weber on Redgate Beach, Detective Inspector Diana Reeves and supernatural consultant Mick Hargraves—possessed by the ancient demon Marchosias—are called to investigate a series of impossible murders plaguing the Devon countryside. What begins as isolated killings of estate workers escalates into something far more sinister when they discover the victims have been systematically drained of blood in ways that defy forensic explanation. Their investigation leads them to retired Detective Sergeant Stan Stanford, who investigated the original Weber case and carries crucial knowledge about the supernatural forces at work.

As the body count rises, the investigators realise they’re tracking not just a killer, but something conducting a methodical campaign of revenge against specific targets. The murders follow patterns that suggest intimate knowledge of vampire society and its ancient hierarchies, while the perpetrator demonstrates capabilities that transcend traditional supernatural limitations—including the ability to operate during daylight hours when vampires should be helpless. When Stan makes the ultimate sacrifice to provide tactical intelligence about their adversary’s weaknesses, Reeves and Mick find themselves caught between warring factions of an ancient supernatural conflict that threatens to expose the hidden world entirely.

The investigation transforms from routine police work into a desperate hunt through the shadowy politics of vampire society, where concepts of justice and mercy have been perverted by centuries of accumulated power. As the truth behind Jessica Weber’s death finally emerges, Reeves and Mick must navigate between their oath to protect the innocent and the growing realisation that sometimes justice requires methods that conventional law enforcement cannot provide. Their enhanced capabilities as a supernatural investigation team will be tested to their limits as they confront enemies who view human authority as merely another obstacle to be eliminated in their quest for vengeance that has been ten years in the making.