Kiri, a black girl in the process of being adopted by a middle class white family, goes missing on an unsupervised visit to her birth family arranged by her social worker, Miriam.
D.I. Mercer is forced to make a change; Tobi supports his son; Miriam takes her fate in her hands; Alice's devastation gets the better of her.
Alice goes on the offensive after D.I. Mercer tells her and Jim about new evidence in the case, which means charging Nate with the crime will be difficult.
As the backlash against Miriam grows, Tobi is wracked with guilt about his role in Kiri's death and becomes determined to find his son Nate, the prime suspect in her murder.
Kiri, a young black girl in the process of being adopted by a middle-class white family, goes missing; as the search for her intensifies her social worker, Miriam, publicly takes the blame.