On a late summer Monday, Doctor Claire Roget takes up her new post of clinical psychiatrist at Greatbach Secure Psychiatrist Unit in the Midlands city of Stoke on Trent. Six months ago, her predecessor Heidi Faro was brutally murdered in her office by one of the inmates, Stefan Giulio, who suffers from brain damage. As Claire is adjusting to her new job, she becomes increasingly suspicious that someone else might have been involved in the murder...