London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.
Episode 1
When a skeleton is unearthed, a car key found near the body is the only clue to the identity of the victim.
Episode 2
DCI Cassie Stuart begins to identify the people mentioned in the diary of Jimmy Sullivan.
Episode 3
As the investigation in to Jimmy's death continues, Cassie and Sunny visit Father Robert Greaves hoping to identify the mysterious Jo-Jo.
Episode 4
The investigation into Jimmy's death continues, as Cassie and Sunny question Sir Phillip Cross.
Episode 5
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.
Episode 6
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.
