The teenagers are trapped in the building, and Polly directs her anger at the development's project leader—but is shocked to realise it might be her daughter who gets the blame.
In the aftermath of the tragedy, Polly worries that Iwan might be hiding something. Angela gathers the families to fight for justice. Harriet faces questions at work.
The inquest opens and questions are asked of Iwan, Alan and Harriet. Polly is forced to choose between her husband and justice when asked to betray Iwan.
Harriet is in the dock for gross negligence manslaughter as the families' private prosecution finally arrives in court. Polly fears for Leona, who wants to give evidence.
