The bodies of an elderly couple are discovered buried in a garden in Mansfield. Susan, their daughter, and her husband Christopher find themselves under investigation.
The pressure of police questions takes its toll on Susan and Christopher. The past comes back to haunt them and Susan ultimately reveals a deep secret.
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 which calls the couple's reality into question.
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 the limits of their love.