When a skeleton is unearthed, a car key found near the body is the only clue to the identity of the victim.

DCI Cassie Stuart begins to identify the people mentioned in the diary of Jimmy Sullivan.

As the investigation in to Jimmy's death continues, Cassie and Sunny visit Father Robert Greaves hoping to identify the mysterious Jo-Jo.

The investigation into Jimmy's death continues, as Cassie and Sunny question Sir Phillip Cross.

As the investigation into Jimmy's death continues, Sir Phillip Cross makes a difficult decision while Father Robert comes clean to his family and the police.

As the investigation into Jimmy's death concludes, Father Robert finds that revealing the truth has lasting repercussions and Maureen lays her son Jimmy to rest.

When a severed leg is discovered in a bricked-up chimney flue the team get to work identifying the victim and cause of death. Cassie’s replacement on the force, DCI Jess James, has a rocky start as she clashes with a grieving Sunny.

The team work to identify the body found in the chimney flue as forensics reveal the cause of death. Jess and Sunny visit the victim’s mother to break the devastating news. They find the pair had a tumultuous relationship.

The victim’s turbulent past comes to light. While Sunny takes a trip to Paris and Jess drops in on an unsuspecting Lord, the pair continue to butt heads.

Sunny and Jess’s personal lives go from bad to worse while they struggle to keep focused. Meanwhile, the suspect list grows and a mother and son are put under the microscope.

Despite the trouble in their personal lives, Sunny and Jess attempt a reset as they follow the clues in the case.

Can Sunny, Jess and the team bring the clues in the case together and unravel the secrets to solve it?