Sometimes darkness stalks the most beautiful places...

On Doogarth East Bog, Achill Island, a body is found. The close community is stunned to learn that it's Lisa Moran, a popular teacher who disappeared two days earlier.

DS Lucy Golden is assigned to the case. For her, it's personal. As an Achill native, she knows that sometimes great evil can lurk in plain sight. Having moved back from Dublin, she has spent the last ten years trying to prove herself to her colleagues after her husband was jailed for fraud. This is her chance to put the past behind her. Her teenage son Luc's behaviour, however, is increasingly troubling and Lucy doesn't have time for distractions.

When another body is found in an abandoned property on the bog, with links to a murder 20 years ago, the stakes are raised - but a pattern is emerging. Can Lucy put the pieces together? Or will her family crisis mean the murderer claims his next victim?