The hunt is on to find a gang of suspected cannibalistic killers lurking in the sewers before a missing girl becomes the next victim. The station is under attack and the forces of evil are moving against the team on all sides, and as the case takes a dangerously personal twist for Chandler, he must resort to desperate measures.

In the sewers two workmen find the disembowelled corpse of young runner, Thomas Griffin. Dr. Llewellyn believes his killer removed his stomach and entrails. The next victim, Anne Ayres, is found in the same state as Thomas. Both were profiled by journalist Peter Dunn, at the same time urban farmer Josie Eagle is pursued by a sinister group.

As more flayed bodies turn up, Chandler and Miles question the motives behind these bloody deeds. Buchan's research puts him in danger.

Following the discovery of a flayed face in a local gallery, Chandler and Miles find themselves becoming involved in the contemporary art world.

A connection to a 16th century murder seems to confirm that someone is killing witches in Whitechapel, but the investigation is impeded when a link to present-day espionage attracts the attention of the security services. Chandler is on the case, only for it to appear that there may be a malign influence at the very heart of the team. The station pulsates with unexplained phenomena, and even Miles starts to ask questions. Is anywhere truly safe, and who or what is behind the evil that seems to be surfacing all around?

The team investigates the murder of a man who is crushed to death by stones and, as the killer's methods are revealed, Chandler unearths a sinister precedent.