Grief tears through Hollington Drive 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 this tragedy. Theresa is troubled by her own son's behaviour; Is it possible that he was somehow involved in Alex's disappearance?

Theresa and Helen are still trying to make sense of the kids' conflicting stories when Hollington Drive is rocked once again: a body has been found. As the police investigation intensifies and speculation sweeps through the community, is Theresa willing to lie to protect her son?

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 by wanting to go to the police.

As the family wait for news on David, Eva is ready to reveal more about the days leading up to Alex's disappearance. Will Theresa uncover the truth of what really happened to Alex, or will an unsolved mystery hang like a dark cloud over Hollington Drive?