DC Emma Angel has a new boss who was an old enemy. And she has to catch a ritual killer who leaves very few clues.Ex-DCI Rob Haines is mentoring a teenage girl with a troubled relationship with her father.Emma tries her hardest to track down the killer, while learning how to work with her new boss. She also has to deal with Lukas' new love interest that threatens to wreck her friendship with him.Meanwhile, Rob gets drawn into trying to help a teenager although his good intentions go awry as the police investigate him for grooming. He holds the key to Emma's mystery killer but soon they'll find both their lives are threatened.Sometimes you need more than good intentions.