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.
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.