Tasked with leading the Open Case Review Unit, her usual post-mortem work has been extended to cold-case investigation into unsolved suspicious deaths. When a garda detective is murdered, his body mutilated and dumped on gangland ground, she is called in. As a large-scale investigation takes shape to hunt down the killers, Terry's post-mortem uncovers uncomfortable evidence.

She soon finds herself up against the powers that be. But, as new evidence emerges from her cold-case work that impacts closer to home, this may be the least of her worries. Can the identity of her sister Jenny's killer, all those years ago, be revealed? And are some truths best left buried?