There is a hint of Armageddon in the air. According to the Nice and Accurate Prophecies of Agnes Nutter, Witch (recorded, thankfully, in 1655, before she blew up her entire village and all its inhabitants, who had gathered to watch her burn), the world will end on a Saturday. Next Saturday, in fact.
When a woman's body is found in a North London flat clutching a bloodstained sliver of X-ray, DI Thorne discovers that the victim's mother had herself been murdered fifteen years before by the infamous serial killer Raymond Garvey. When more bodies and more fragments of X-ray are discovered, a horrifying picture emerges: a killer is targeting the children of Garvey's victims...