Cambridge is home to 18,000 students, 1,500 academics - and one serial killer.

The discovery of the headless, mutilated body of a female undergraduate in her blood-soaked college room marks the start of a series of bizarre murders by a killer the media call the 'Cambridge Butcher.' For the students of Ariel College, university life has become not about surviving their exams, but simply about surviving.
Forensic psychiatrist Matthew Denison is sure that his traumatised patient, student Olivia Corscadden, has the killer's identity locked up in her memory. That within the little clique she belonged to lurks someone with a grudge. Someone who has yet to finish settling their score.
In order to get to the truth, Denison must delve into the secrets hidden within Olivia's subconscious. Secrets that are about to lead him into a nightmare beyond imagining.