When Shetlander, Thomas Malone, has his conviction overturned after 23 years behind bars, D.I. Perez must re-open a murder investigation. Teenager Lizzie Kilmuir was strangled in 1993 and Malone was jailed for the crime. Now new evidence has come to light provoking Malone's release, but many islanders still believe him to be guilty, including some officers amongst Perez' own team. Malone's return coincides with the murder of local journalist Sally McColl. With two cases to solve and Malone very firmly in the frame for both, the pressure is on Perez to look beyond the prejudice and get to the truth.