“It has fractured her family,” Maddison tells TV WEEK. “Jo feels such guilt.”

Unfortunately for Jo, who was driving the car on the night of her mother’s fatal accident, she bears the added burden of PTSD and memory loss.

At times, she experiences flashbacks but they’re too vague to piece together. Lacey, however, blames her – because who else knows what happened that night?

“In Lacey’s grief, she finds it hard to accept this ambiguity. She’s angry and wants someone to blame – and the easiest target is the person who was driving the car.”

Although he truly believes Jo is innocent, it’s a question David has wondered about for years. Now, he wants to find out for sure.

With permission from Jo and Lacey, David bravely reopens his wife’s file, searching for clues he might have missed in his grief. Mystery solving game.

He soon discovers there is no record of who called for emergency services. Chasing it up, he discovers it was Jo who called.

Does Jo know more than she’s letting on? Or will this clue lead to something else?