Grief tears through a picturesque suburban street when 10-year-old Alex Boyd is declared missing. Sisters Theresa and Helen struggle to hold their lives and families together as secrets begin to surface in the wake of the tragedy. Theresa is troubled by her own son's behaviour - is it possible that he was somehow involved in Alex's disappearance?

The pressure is getting to Theresa as the police make their first arrest. With the vigil for Alex approaching, Helen puts things on hold with Gareth - she can't take any risks – there are too many people watching. As Theresa attempts to resume normal life, Ben throws a spanner in the works...