A new posting to the town of Loch Iris, and Jay Swan's hopes of a new beginning with Mary are shattered when he's nearly sideswiped by a stolen car, the suspicious death of an elderly nun and a missing child.

Jay is frustrated at Simmo's stance that Sister Kerry's death was an accident. Jay's brother Sputty is implicated in a murder. No closer to finding Scarlett, Jay has a suspect in his crosshairs.

Jay and Mary's world is thrown into unimaginable horror when Anya goes missing. Jay goes rogue when he imprisons a suspect.

Pushed to the edge, Jay interrogates his suspect. Sputty warns Jay to back off, he's gone too far. The discovery of who took Anya strains Jay and Mary's relationship to breaking point.

The dark silent secrets of Loch Iris are slowly rising to the surface. Jay closes in on the suspects. Mary's world is torn apart.

The solving of a thirty-year mystery reveals the depths of trauma Loch Iris has been concealing for decades. The killers are exposed. Through this fog of tragic history Jay and Mary are brought closer together.