When a bloody corpse is discovered in a North London park, Detective Inspector Daniel Graves is the man tasked with finding the killer. With no clues and no suspects it seems like a dead end. Then another body turns up and this time it looks like it could be his fault. Has his investigation caused the murderer to strike again? Is he dealing with a serial killer? ​ As case one 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. Daniel 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.

A police detective follows a trail of gruesome murders through London—while someone else follows him—in this dark thriller by the author of The Demons Beneath. Two victims. Brutally murdered in their own home. Body parts taken. DI Daniel Graves faces his toughest challenge yet when he is given a murder case with no motive and no suspect. Then the next victims are discovered. Again, in their own home. More body parts taken. Someone is breaking into houses across the city at night, leaving horror in their wake. It seems to Graves 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? Meanwhile, a journalist’s obsessive pursuit of the story to further her career threatens to do more harm than good—and someone is targeting Graves personally, seeking revenge . . .

Bloody remains. Multiple victims. Ritual sacrifice? 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 DI Charlie Palmer begin to investigate the ritual and the act of human sacrifice, they enlist the help of Charlotte Gooding, a talented professor specialising in the subject. They hope to narrow down on 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 is not afraid to make it a very public display. There's just one problem. Grave's past is still not behind him. Someone is eager to make sure he doesn't forget, 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.