Former Greater Manchester Police officer Claire Church's peaceful existence in the Western Isles is shattered when four bodies linked to her previous investigations are unearthed.

The story of Claire Church (Duff), a former police officer who moves away to the remote Western Isles in an attempt to escape the violent past that still haunts her. Soon, Claire is pulled back into an investigation she thought she had left well behind, by her former lover and colleague DCI John Hind (Johnny Harris) and his new DS Anthony Boyce (Luke Newberry).—Michael Bourke