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

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 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.

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

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

When the body of a former schoolteacher 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.