When the murdered and mutilated body of a local loan shark is found in Canterbury Cathedral, Detective Chief Inspector Bethany Harper and her team know they need to work quickly to calm the city's nervous residents.
With a victim who was hated and feared in equal measure, there's no shortage of suspects for the team to investigate. And the high-profile site where the body was found puts the team under huge pressure from people across the city.
The discovery of a second victim, murdered and mutilated and left in one of the world's oldest churches, confirms Beth's worst fear: there's a serial killer on the loose in Canterbury and the clock is ticking to find them before they find their next victim.