Years after being jailed for murdering Lizzie Kilmuir Tommy Malone is released on appeal, leading Jimmy to believe there is a second suspect and that the original investigating officer Drew McColl bullied Tommy into confessing. Somewhat unwisely Tommy returns to his late mother's house on Shetland and general hostility. However Lizzie's sister Kate is sympathetic whilst Drew's daughter Sally, an investigative journalist, also champions Tommy but is herself killed. Meanwhile local vigilantes go after Tommy. Written by don @ minifie-1

Having survived the attempt on his life Tommy calls on Jimmy, who believes that he did not kill Sally. Sally's boyfriend Alan Killick is a suspect in Tommy's abduction but his DNA suggests that his father murdered Lizzie, leading to an exhumation and confrontation with Drew's informer Benny Ray. The hunt for Sally's murderer switches to the oil company Forst Energy and its agent on Shetland, Andreas Hagan, whom Sally met in Norway regarding the cover-up of worker Danny Hamilton's death but Danny's widow gives Alison no help, causing her to fly to Bergen. Written by don @ minifie-1

The exhumation leads to Alan's parentage being revealed as a likelihood for Lizzie's killer whilst Benny Ray is attacked by Tommy, feeding Drew's view that he murdered Lizzie. In Norway Alison and local detective Lars locate Hagan, who denies Sally visited him. She does, however, learn that Sally met with Mathias Soderlund, a leading member of the far right group NDA and Jimmy flies out to join her. They cannot find Soderlund but make a revealing discovery about him . However somebody is warning them off. Written by don @ minifie-1

Jimmy and Alison learn that Soderlund is an undercover agent working to expose the NDA for the Norwegian secret service but when they find him his cover has been blown and he has been killed. They return to Shetland for Sally's memorial service where Kate and Tommy's affair is revealed and he is still a suspect. Another resident, Jo, is found to have been enamoured of Alan whilst Alison receives a welcome visitor and another crime is reported. Written by don @ minifie-1

After crofter Jo Halley is attacked Jimmy believes it is because she saw Sally talk to a person of interest in the murder case. Whilst two mainland officers arrive and set their sights on Tommy Alison has her suspicions about the recently arrived Lars, who is a proven member of the far right NDA. Meanwhile Jimmy has cause to connect his friend Duncan to Sally's murder as well as making a find in an old video. Written by don @ minifie-1

DNA confirms Duncan as Alan Killick's father and possibly a double killer and he is arrested. Then a perusal of Sally's files brings another suspect into the picture, literally - one who had good reason to dispose of Lizzie and who makes a confession of guilt. However Jimmy discovers that this person may not have murdered Sally but still finds both Duncan and himself in a dangerous situation before there is closure. Written by don @ minifie-1