D.I. Graves is back on the case to face his toughest challenge yet: a case with no motive and no suspect, nothing at all that could explain why someone would kill innocent people and then take parts from the bodies. Then the next victims are discovered: another pair of bodies, new body parts taken, and again in their own home. Someone is breaking into houses across the city at night, leaving horror in their wake. It seems to Graves that this could be two serial killers, working together. But how are they choosing their victims? Is any house in London a target? Is anyone safe? To make matters worse, a journalist is threatening to cause more harm than good with her obsessive push in covering the story to further her career, and someone is targeting Graves personally, seeking revenge against him in relation to an old case. Can Graves keep himself safe long enough to stop the serial killers before they strike again?

When a bloody corpse is discovered in a North London park, Detective Inspector Daniel Graves is the man tasked with finding the killer. However, with no clues and no suspects, the case seems like a dead end. Then another body turns up–and this time, it looks like it could be Graves’s fault. Has his investigation caused the murderer to strike again? Is he dealing with a serial killer? As the case gets ever more complicated, a report comes in of another suspicious death–but this is nothing like any other Graves has dealt with. All involved are convinced that something supernatural is to blame: a demon. Graves is no believer, but could he be wrong? With two cases on his shoulders and the truth behind each beyond his grasp, Graves must race against time before both killers–human or otherwise–strike again.

When a blood-stained effigy of body parts is found in a central London park, D.I Daniel Graves must set about trying to discover what it could mean and find the person responsible. Symbols at the crime scene suggest the occult. Who would leave a murder victim in such a way, and why? As Graves and partner D.I. Charlie Palmer begin to investigate the ritual and the act of human sacrifice, they enlist the help of Charlotte Gooding, a talented professor specializing in the subject. They hope to narrow down a motive–could the killer believe in the supernatural? Witchcraft, even? Then the next crime scene is found. More blood, more symbols, and out in the open. It seems the killer wants the world to pay attention, but why? How are they choosing their victims? The pressure is on for Graves to put an end to the murders before more remains show up in brutal tableaus. One thing is for sure: this killer is out for blood, and they’re not afraid to make it a very public display. There’s just one problem. Grave’s past still isn’t behind him. Someone is eager to make sure he doesn’t forget, that he cannot move on, and they’re not playing games anymore. There may be an occult killer out there, but now there’s another out for blood–Daniel Grave’s blood.