DCI Peter Boyd hunts a killer who murdered a schoolgirl five years earlier. Then the killer contacts him saying he's abducted another girl. Could exhuming the murderer's first victim provide vital clues?

A woman torches a car, which leads Boyd to investigate a car crash that may not have been an accident.

A newly discovered note seems to set the seal on a suicide verdict, but when Boyd and the team exhume Perry Coleman's body, DNA tests reveal some disturbing facts.

A skeleton is discovered during building work at a church.

When Father Stuart is found murdered in the same excavation the body was discovered, the team makes a connection.

After serving half her sentence for the murder of her husband and neighbor's son, new evidence suggests that Annie Keel could be innocent.

An anonymous letter writer demonstrates to the Boyd that Annie Keel was not the only person present during the murders, but his motivation remains a mystery.

The body of missing Police Sergeant Debbie Briton turns up in a golf bag. Suspicion falls on a stalker, but Grace is not convinced that he is the killer.

Boyd and the team track down murdered police officer Debbie's married lover, but he denies killing her. Meanwhile, stalker Christopher Redford is ready to confess to the murder, but Grace is not convinced he's the guilty man.