Two men are found dead in London's Battersea Park. One of the bodies has been laid out like a crucifix - with his eyes removed and placed on his open palms. Detective Inspector Grace Archer and her caustic DS, Harry Quinn, lead the investigation. But when more bodies turn up in a similar fashion, they find themselves in a race against time to find the sadistic killer. The hunt leads them to Ladywell Playtower in Southeast London, the home to a religious commune lead by the enigmatic Aaron Cronin. Archer and Quinn suspect Cronin's involvement but his alibis are watertight, and the truth seemingly buried. If Archer is to find the killer, she must first battle her way through religious fanatics, London gangsters - and her own demons . . .