Natalie is on edge herself, taking drugs to control her own mental illness and seeing her own mentor/psychologist, Declan. Natalie is also still recovering from a case which saw a woman she was treating jailed for killing her baby. When a case involving the same father and another missing child is brought to her Natalie cannot help but get involved. Despite knowing that it is a bad idea, and against the advice of her therapist, she agrees to help the police in the hope that this time she can achieve what she feels is justice.