Kay Hunter has survived a vicious attack at the hands of one of the country's most evil serial killers. Returning to work after an enforced absence to recover, she discovers she wasn't the only victim of that investigation. DI Devon Sharp remains suspended from duties, and the team is in turmoil. Determined to prove herself once more and clear his name, Kay undertakes to solve a cold case that links Sharp to his accuser. But as she gets closer to to the truth, she realises her enquiries could do more harm than good. Torn between protecting her mentor and finding out the truth, the consequences of Kay's enquiries will reach far beyond her new role.