The investigative thriller about the deeply buried secrets that families keep - and their devastating consequences - returns for another gripping series.Broken by the death of her youngest daughter, Grace, a vulnerable Val is targeted by Dr Paul McFarlane, a brilliant and charismatic psychologist. He seems to have a preternatural sense of how to push her buttons, create a culture of dependency and undermine her sense of self. Shocked and alienated by their mother's recklessness, Val's other daughters, Jenny and Anna, resolve to find out exactly what happened to their sister. But as the family struggle to reach Val and take back power from Paul, they learn that their family's dark past has one final, devastating blow to deliver to each of them.