When troubled gambler Nick Williams is murdered at a greyhound track it seems at first that his huge debts cost him his life. The team delve deeper and find an embittered wife, a disgruntled local ruffian and a greyhound handler with secrets of his own. Is there more to Nick's past than the team yet know? Their investigation takes in race fixing and sex tapes, and things get really complicated when one of the suspects is also killed. The detectives must race to find the culprit before the father of the dead suspect takes the law into his own hands.

A recently regenerated community receives an unpleasant reminder of its grim past after a body is found hanging in the children's playground. When the father of the community's rebirth, Harry Wallace, falls under suspicion, Reid fights to clear his name, but the team begin to fear that she is letting her feelings for him cloud her judgement. She remains convinced that Wallace is not capable of murder despite evidence that he is not all he seems and as the case unfolds the team finds it increasingly difficult to share her conviction.