Perez is on the trail of an attacker, Tosh investigates an oil company in the hunt for Sally’s killer, and DNA testing in the Kilmuir case yields a surprising result.

After a second body is found brutally murdered on Shetland, Detective Inspector Jimmy Perez wonders if the two killings are connected to corporate greed and corruption on the island or…

When Thomas Malone has his murder conviction overturned after 23 years behind bars, DI Perez has to reopen the investigation into the 1994 death of local teenager Lizzie Kilmuir.