Truth and fantasy clash as Susan and Christopher Edwards face trial. Meeting for the first time since their arrest, old doubts and new regrets test their love.

The building blocks of Christopher and Susan Edwards’ carefully reconstructed life begin to collapse after a single phone call.

Christopher opens up about his past as the couple's relationship with Susan's parents comes under the spotlight. Lancing and Wilkie have a breakthrough.

As the investigation into the Mansfield double murder continues, Susan and Chris's past is revealed and secrets emerge.