Just when you least want or expect it, the past comes looking for you...

After a stake-out turns deadly, Detective Sergeant Jack Mellor's life spirals out of control. Struggling with guilt and distrust, he quits the force and retreats to the remote northern Highlands, seeking solitude. But peace is hard to find.

When he is hired to investigate the suspicious disappearance of a young woman, Mellor is reluctantly drawn back into a world of corruption, crime, and deceit. As he uncovers disturbing secrets, Mellor's new life begins to unravel.

Complicating matters, his ex-partner Maddie reappears, and a potential new romance is shattered. As Mellor digs deeper, he uncovers a horrifying operation, with shocking connections to those he thought he could trust.

Betrayed and disillusioned, Mellor faces the darkest moments of his life. But as his world crumbles, will a glimmer of hope emerge?

And in the hauntingly beautiful Highlands, with only a loyal dog for company, can Mellor overcome his demons and bring the guilty to justice?