When new evidence emerges in the long-unsolved disappearance of a young girl, Detective Inspector Laila Haynes is called upon to revisit a case she believed was firmly behind her. Years earlier, a local man was convicted and imprisoned for the girl's abduction, but questions surrounding the original investigation threaten to unravel everything.

As Haynes takes charge of the renewed investigation, her protégé, DC Rupert Ellis, begins uncovering inconsistencies in the original case files. Unexplained alterations to police records lead him to suspect that crucial evidence was deliberately concealed.

But as Rupert digs deeper, he encounters resistance from within the very institution he serves, while Haynes becomes increasingly determined to keep the investigation under control.

With the truth buried somewhere in the past, how far will they go to uncover it?