Who hunts the hunters?

When a man is found dead, mutilated in his house, DS Wendy Knight and DCI Jack Culverhouse soon realise that Jeff Brelsford was killed for one reason: he was a paedophile.

As Wendy does her job and tries to find the killer, Culverhouse is less keen. As far as he's concerned, this is justice.

With Culverhouse's attitude and stubbornness leaving him on the sidelines, Wendy delves deeper into the dark and murky world of Jeff Brelsford, and what she discovers is enough to shock her to her core.

Could it be that the killer was someone very close to home... a police officer?