New crime drama - the murder of a nurse is a huge shock to a small urban community in Pembrokeshire.

Anna's claims about the past upset Ffion, as the hunt for Ryan Moss - Abbi's former boyfriend - intensifies. A chase ends with an arrest - but is the real killer still out there?

A person with a gun has found their way into the local Comprehensive School, looking for Rick's daughter Mati. Rick, visibly shaken by the day's events, turns to Ffion, rekindling an old flame.

A person with a gun has found their way into the local Comprehensive School, looking for Rick's daughter Mati. Rick, visibly shaken by the day's events, turns to Ffion, rekindling an old flame.

Ffion and Rick's relationship deepens as the past continues to disturb the present. Ffion, riddled with guilt and shame, is worried that Abbi's killer remains at large.

Ffion follows his instincts back to the bunkers. The very murderer is caught, but there is still no sign of Helen. Rick follows his intuition about Helen, with devastating consequences.