After receiving an anonymous call leading police to the body of an old man who has been decaying for weeks, DCI Cadi John and DS Owen Vaughn are forced to work against the clock to find out the murderer's identity. This leads them into the shadows of the slate-strewn mountains of Blaenau Ffestiniog to unlock more dark secrets.
Elenco: Sian Reese-Williams , Sion Alun Davies , Rhodri Meilir , Victoria Pugh , Lowri Izzard , Garmon Rhys , Elodie Wilton , Nia Roberts , Gwyneth Keyworth , Gillian Elisa , Ian Saynor .