When the body of an old man is discovered in a house on the outskirts of Blaenau Ffestiniog, D.C.I. Cadi John and D.S. Owen Vaughan are called upon to lead the investigation.

D.C.I. Cadi John and D.S. Owen Vaughan pay Karl Lewis a visit. Mia tries to draw Connor closer to her.

The community comes together to pay its respects to Geraint Ellis. Mia succeeds in drawing Connor closer to her.

DCI Cadi John has to release Karl Lewis because of a lack of evidence. Mia, Connor and Lee cause trouble for Hefin, Beca and Sion at the petrol station.

Hefin discover Sion Wells' body at the petrol station and now D.C.I. Cadi John and D.S.Owen Vaughan have to deal with two separate murders.

DCI Cadi John and DS Owen Vaughan succeed in apprehending Mia, Lee and Connor, but there is only a hollow sense of victory.

The body of a young woman is found in a stream. DI Cadi John a DS Owen Vaughan investigate her identity.

Cadi and Owen investigate a possible link to another girl who disappeared. Megan hides her difficulties from friends and family. Dylan takes an interest in Lowri.

Cadi and her sister Elin have an opportunity to discuss their father's future, and Dylan and Megan's lives collide when they are in the same place at the same time.

Iona's temper worsens as she punishes Nia and the police visit Dylan to question him.

Alun Pryce's anger boils over and he lashes out at a drug dealer, while Cadi and Vaughan take a step forward in their investigation as they visit a local reclamation yard.

Cadi goes to visit Endaf Elwy in prison, and Megan is reported missing, leaving the police convinced she is the latest victim.

The police finally succeed in getting the required information and this leads to some explosive events.

Will Cadi and Vaughan catch their man in the last in the series?