Revenge is a dangerous thing.
Detective Chief Inspector Roberta Steel got caught fitting up Jack Wallace - that's why they demoted her and quashed his sentence. Now he's back on the streets and women are being attacked again.
The top brass have made it very clear that if Detective Sergeant Steel goes anywhere near him, she'll be thrown off the force for good.
But she can't just do nothing - if she does he'll keep hurting women. The question is: how much is she willing to sacrifice to stop him?