As a police team begin work on the five-year-old cold case of a teenage girl's murder, they inadvertently inspire the killer to strike again.

The team exhume the first victim to find clues with new DNA techniques. When Boyd thinks he is getting closer, he finds he is facing one smokescreen after another.

Contains violence. When Detective Superintendent Boyd encounters a woman unable to accept the explanation of her father's death, he takes on the case.

Contains violence. New evidence points to suicide but, when Boyd and the team exhume Perry Coleman’s body, DNA tests reveal some disturbing facts that call this into question.

When a skeleton is discovered in a Church crypt Boyd and his team suspect it was never meant to be found. The team interview the local community and awaken deeply hidden family secrets that force Boyd to look at his own past.

Frankie learns that the skeleton and a priest may be related as both show symptoms of Huntington's Chorea. The hunt is on for the killer and the victim's mother. Meanwhile, the investigation opens old wounds for Boyd, still in despair over the disappearance of his own son.