The lives of two sisters, Theresa, and her older head teacher sibling, Helen, and a missing child.
Cast: Anna Maxwell Martin, Rhashan Stone, Ken Nwosu, Tia may Watts, Rachael Stirling, Peter McDonald, Amelie Bea Smith, Fraser Holmes, Jodie McNee, Jonas Armstrong, ElÃ¨na Gyasi, Jim Howick, Dan Burgess, Julie Barclay, Hughie Hamer
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?
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: He wants to go to the police.
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 is Theresa willing to lie to protect her son?
On a Summer evening in the seemingly idyllic suburb of Hollington Drive, 10-year-old Alex Boyd is declared missing. As grief tears through the community, sisters Theresa and Helen fight to hold their lives and their families together.