Vivia Brisk knows about the dead. She should. She's died enough times. Vivia is a hag, one of the last of her race, and can die, visit the underworld, and return at will. She loves her job helping London's most vulnerable supernaturals, even if her colleague Malcolm drives her round the bend on a daily basis. Then Malcolm is outed as a zombie, and along with his teenage son, flees the police. When Malcolm is captured, he is only able to pass on one message before his dead brain degrades completely: 'He killed me.' When the police find decades-old corpses hidden near Malcolm's home, Vivia begins to realise Malcolm's still-missing son is in a lot more danger than from just a possible zompocalypse...

Being dead is nothing new for Vivia Brisk. She's been doing it all her life. It's staying dead that's the problem. When Vivia finds herself stuck in the Underworld, she turns to another hag for help. It comes with a deadline and a price tag. Seventy years ago, Tilde was murdered and she wants Vivia to extract vengeance. At first, Vivia thinks there's nothing behind the claim except a good dose of paranoia, but as she digs deeper she finds it might not be so crazy after all. Someone has been methodically exterminating hags for centuries, and if Vivia doesn't figure it out quickly, she's going to be next…