Conversion enforcement.
Two men found castrated, one alive, one dead - he bled out.
Who's doing it, why?
More victims, generic description of the attacker.
All victims are gay men, they are talked to regarding their sexuality, how it was wrong, they should be heterosexual. Have families, get married.
None of the victims accepted his suggestions, so he tried chemical or physical castration.
Zoë is working her team hard, they are getting nowhere fast. A profiler is brought in, but denies she profiles!
Will they find the culprit, where did he get his medical knowledge from?
All the removals are neat, not perfect. Not a doctor. Where else would some one get experience in this area?
It's down to Zoë and her team to find out, whilst hampered by Ian Osman, assigned to her team while he collects info for professional standards, but which side is he really working for.
Good series of books, Zoë Finch is a real character with talents and faults in equal measures, but the karate expert mum trusts her gut. Her gut is good.